Answer:
Larissa would spend a total of: $7,680 in 1 year
Step-by-step explanation:
Danielle was completing her science project and mixed saline solutions A and B. Brand A was a six gallon 18% saline solution and she ended up with an 18 gallon 8% saline solution mixture. Find the percent of saline solution in brand B.
A. 2.1%
B. 21%
C. 3%
Brand B contains 3% saline solution by volume. Then, C is the right answer.
Percentage of saline solution in brand B, let x be.
We know that the overall volume of saline solution in the combination is 18% of 6 gallons plus x% of (18 - 6) gallons since Danielle blended brands A and B to make a total of 18 gallons of 8% saline solution.
Then the equation is given as,
0.18(6) + 0.01x(18 - 6) = 0.08(18)
Simplifying and solving for x, we get:
1.08 + 0.12x = 1.44
0.12x = 0.36
x = 3
Therefore, the percentage of saline solution in brand B is 3%.
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A local newspaper claims that 70% of the items advertised in its classifieds section are sold within 1 week of the first appearance of the ad. To check the validity of the claim, the newspaper randomly selected n = 25 advertisements from last year's classifieds and contacted the people who placed the ads. They found that 14 of the 25 items sold within a week. Based on the newspaper's claim, is it likely to observe x 14 who sold their item within a week? If you could show work.
The newspaper's assertion is correct, it is unlikely that 14 triumphs will be observed in a sample of 25.
The further answer is described below.
In this problem,
The binomial distribution can be used.
Let p represent the likelihood of an item selling within a week, as reported by the newspaper,
And q represent the probability of an item not selling within a week
Then we have,
p = 0.7
q = 1 - p = 0.3
n = 25 (sample size)
x = 14 (number of items sold within a week in the sample)
The probability of observing exactly x successes in n trials,
Given a probability of success p, is given by the binomial probability formula:
P(X = x) = (n choose x) \(p^{x}\)\(q^{(n-x)}\)
Where (n choose x) = n! / (x! x (n-x)!) is the number of possible ways to choose x items out of n.
Put the values,
P(X = 14) = \(^{25} C_{14}\) 0.7 0.3
= 0.107
So, if the newspaper's assertion is correct, the probability of detecting exactly 14 successes (i.e., things sold within a week) in a sample of 25 is around 0.107 or 10.7%.
If the newspaper's assertion is correct, it is unlikely that 14 triumphs will be observed in a sample of 25.
However, it is not impossible, therefore we cannot rule out the chance that the newspaper's assertion is genuine based just on this sample.
To get a more certain conclusion, a bigger sample size would be required.
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Bob can complete his Math homework in
2.5 hours, but if he works with Joe they can finish in 1.5 hours. How long would it take Joe to finish his homework on his own?
Answer:
3.75 hours
Step-by-step explanation:
Bob completes his homework in 2.5 hours.
In 1 hour, he completes 1/2.5 of his homework.
Joe completes his homework in x hours.
In 1 hour, he completes 1/x of his homework.
Together, they complete the homework in 1.5 hours.
In 1 hour, they do 1/1.5 of the homework.
1/2.5 + 1/x = 1/1.5
Convert the decimal numbers in the numerators into fractions.
1/(5/2) + 1/x = 1/(3/2)
2/5 + 1/x = 2/3
Multiply both sides by the LCD, 15x.
6x + 15 = 10x
-4x = -15
x = 3.75
Answer: 3.75 hours
What is the best description of originality?
nonobvious
special or interesting
convergent
having a low probability, unique
Originality is the quality of being unique, new, and innovative. It requires creativity, imagination, inspiration, and nonobviousness. Special or interesting aspects may be present, but they are not sufficient to define originality.
Originality refers to the quality of being unique, new, and innovative. It involves creating something that has not been seen or experienced before. The best description of originality is that it is having a low probability and being unique.
An original idea, product, or work of art is something that has not been copied or imitated from others. It represents a new perspective or approach that can offer a fresh insight into a problem or challenge. Originality requires a high level of creativity, imagination, and inspiration, as well as a willingness to take risks and explore new possibilities.
Nonobviousness is also an important factor in originality. It means that the idea or invention is not something that would be obvious to someone skilled in the same field or industry. In other words, an original idea should not be something that could be easily predicted or anticipated.
Special or interesting are also characteristics of originality, but they are not sufficient to define it. An idea or product can be special or interesting without being truly original. For example, a new flavor of ice cream may be interesting, but it may not be original if it has already been created by someone else.
Convergent thinking, on the other hand, involves finding a single solution to a problem. It is the opposite of divergent thinking, which involves generating multiple ideas and possibilities. Convergent thinking is important for finding effective solutions to problems, but it is not the same as originality.
In conclusion, originality is the quality of being unique, new, and innovative. It requires creativity, imagination, inspiration, and nonobviousness. Special or interesting aspects may be present, but they are not sufficient to define originality.
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Write an equation that represents the graph of the line shown in the coordinate plane below.
The equation of a line in the slppe intercept form is expressed as
y = mx + c
where
m = slope
c = y intercept
The formula for determining the slope is expressed as
m = (y2 - y1)/(x2 - x1)
where
y2 and y1 are the values on the y axis corresponding to the final and initial points on the line
x2 and x1 are the values on the x axis corresponding to the final and initial points on the line
Looking at the points on the line,
x1 = - 2, y1 = - 4
x2 = 4, y2 = 8
m = (8 - - 4)/(4 - - 2) = (8 + 4)/(4 + 2) = 12/6
m = 2
The y intercept, c is the point where the line cuts across the y axis. Looking at the graph, c = 0
By substituting m = 2 and c = 0 into the slope intercept equation, the equation of the line is
y = 2x
if a ferris wheel at the fair has a radius of 18 ft how far will you travel after 8 trips around the ferris wheel
Fine the missing length to the nearest 10th
The value of the missing length to the nearest tenth are;
a. x = 7.5
b. x = 7.8
What is Pythagoras theorem?Pythagoras theorem states that the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse.
Therefore ;
c² = a²+b²
a. x² = 9²-5²
x² = 81-25
x² = 56
x = √56
x = 7.5 ( nearest tenth)
b. using Pythagoras theorem also!
x² = 6²+5²
x² = 36+25
x² = 61
x = √61
x = 7.8( nearest tenth).
Therefore the value of the missing values are 7.5 and 7.8
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How would I go about this? plss i need help!
Answer:
Give me a question to answer and I can show you.
Step-by-step explanation:
Get on your keyboard and start typing your question then I can try my best to help you.
Magda and Nicholas each purchase almonds and cashews for their trail mix recipes as shown.
Almonds
(pounds)
Cashews
(pounds)
Total Cost
(dollars)
Magda 6 1 $73.60
Nicholas 4 3 $78.00
Click on each blank to enter the cost per pound of almonds and cashews.
Answer:
almonds: $10.20
cashews: $12.40
Step-by-step explanation:
A recipe for 24 cookies requires 1/2 cups of sugar. If Ben wants to make 36 cookies, how much sugar does he need?
Answer:
3/4 cups
Step-by-step explanation:
Answer:
2 1/4 cups
Step-by-step explanation:
Hope this helps.
The volume of a cone is 13.4m cubed and the radius is 3.2m what is the height
Answer:
The height is 1.25m.
Step-by-step explanation:
Volume = 1/3 πr²h
Given:
V = 13.4 m³
r = 3.2 m
Asked: height (h)
Substitute the formula with the given values then solve
13.4m³ = 1/3π(3.2m)²h
13.4(3) = 10.24πh
40.2 = 10.24πh
h = 40.2/10.24π
h = 1.25m
The height of the cone is 1.25 meters.
We know that the volume of the cone is given by
V = (1 / 3) * π * r ^2 * h................equation 1
where,
V is the volume of the cone.
r is the radius of the cone's base
h is the height
The volume and radius of the cone are given,
V = 13.4 m
r = 3.2m
substituting these values in equation 1 we get,
13.4 = (1 / 3) * 3.14 * 3.2 ^ 2 * h
on simplifying further
13.4 = 10.717 * h
h = 1.25m
The height of the cone is 1.25 meters.
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the area of a circle
what is a diameter of a circle?
You can find the area by using the formula: S = πr². In this case, r = 4, π = 3.14, so the area equals to 3.14 * 16 = 50.24.
The area is:
50.24 cm²
Work/explanation:
The formula for a circle's area is:
\(\boxed{\!\!\boxed{\quad\sf{A=\pi r^2\quad}}\!\!}\)
where,A = area
π = 3.14
r = radius
Diagram:
\(\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\qbezier(2.3,0)(2.121,2.121)(0,2.3)\qbezier(-2.3,0)(-2.121,2.121)(0,2.3)\qbezier(-2.3,0)(-2.121,-2.121)(0,-2.3)\qbezier(2.3,0)(2.121,-2.121)(-0,-2.3)\put(0,0){\line(1,0){2.3}}\put(0.5,0.3){\bf\large 4\ cm}\end{picture}\)
Now to solve further, plug in the data from the problem:
\(\Large\begin{gathered}\sf{A=\pi r^2}\\\sf{A=3.14\times4^2}\\\sf{A=3.14\times16}\\\sf{A=50.24\:cm^2}\end{gathered}\)
And we get that A = 50.24 cm².
A nature preserve has a population of fifteen black bears. They have been tagged #1 through #15, so they can be observed over time. Two of them are randomly selected and captured for evaluation. What is the probability that bears #3 and #5 are captured for evaluation?
Answer:
1/210 i am pretty sure
Step-by-step explanation:
find the size of angle x 164
Note that the size of angle x = 115°. This is a problem relating to the sum of angles in a circle. See the computation below.
What is the sum of angles in a circle?The sum of angles in a circle is always equal to 360 degrees or 2π radians.
This means that the sum of the measures of the angles formed by any number of rays or line segments that meet at a common point, or vertex, and whose endpoints lie on the circle, will always add up to 360 degrees or 2π radians. This property is often used in geometry and trigonometry to solve problems involving circles and angles.
With regard to the above problem,
We are given three angles in a circle named as follows:
a) 81°
b) 164°
c) x
The above rule state that
81 + 164 + x = 360°
thus, x = 360 - 81 - 164
x = 360 -245
x = 115°
Thus the value of ∠x is 115°
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Full Question:
See attached image.
There will be 6 people at Eli's cake party. You want to bake enough cake so that each person you feed will eat at least 1/5 of the cake. What is the minimum number of cakes to bake?
Please put the procedure with operations used. :(
Answer: 2 cakes.
Step-by-step explanation:
There will be a total number of 6 people at Eli's cake party.
You want that each one of these 6 people to eat at least 1/5 of a cake.
Then you need to make, at least, 6 times 1/5 of a cake.
This is equal to:
6*(1/5) of a cake = 6/5 of a cake.
And we can rewrite this as:
(6/5) of a cake = (5 + 1)/5 of a cake = (5/5 + 1/5) of a cake = 1 cake + 1/5 of a cake.
But you can not bake only 1/5 of a cake, we need whole numbers.
Then we need to round up to the next whole number, which is 2.
This means that you need to bake at least 2 cakes.
Rewrite quadratic function in standard form
Since the function is already in standard form (ax^2 + bx + c form) you don't have to change anything and simply rewrite it.
For the vertex, if you have a quadratic function in standard form -b/2a is the x value of the vertex.
-b/2a = -4/(2(2)) = -1
Since we now know the x-value of the vertex we can plug it into the function to find the corresponding y-value.
h(-1) = 2(-1)^2 + 4(-1) - 10 = -12
So, the vertex is at (-1,-12)
4. The perimeter of a rhombus is 560 meters and one of its diagonals has a length of 76 meters. Find the area of the rhombus. Part A: Determine the length of the other diagonal. Part B: The area is square meters.
Given
the perimeter of a rhombus is 560 meters
one of its diagonals has a length of 76 meters.
Procedure
The perimeter of a rhombus is:
P=4L
\(\begin{gathered} P=4L \\ 560=4L \\ L=\frac{560}{4} \\ L=140 \end{gathered}\)if d1=76 and L=140, we can find d2
\(\begin{gathered} (\frac{d1}{2})^2+(\frac{d2}{2})^2=L^2 \\ (\frac{76}{2})^2+(\frac{d2}{2})^2=140^2 \\ (\frac{d2}{2})^2=140^2-(\frac{76}{2})^2 \\ \frac{d2}{2}^{}=\sqrt{19600-1444} \\ d2=269.48 \end{gathered}\)the area is:
\(\begin{gathered} A=\frac{d2\cdot d1}{2} \\ A=\frac{269.48\cdot76}{2} \\ A=10240 \end{gathered}\)The answer is:
Part A: the length of the other diagonal is 269.48
Part B: The area is 10240 square meters.
factor and solve the zeros for the following x^2+10x-75=0
Mrs. Smith made 6 ¼ dozen cookies for the birthday party. At the end of the party, there were 3 ½ dozen cookies left. How many cookies did the guests eat?
The guests in the birthday party ate 33 cookies.
How many cookies did the guests eat?We know that Mrs. Smith made 6 1/4 dozen cookies and there were 3 1/2 dozen cookies left.
Let's first convert these fractions to a common denominator of 4, so we can easily subtract them.
6 1/4 dozen = 25/4 dozen
3 1/2 dozen = 14/4 dozen
Now we can subtract the number of cookies that were left from the number of cookies that were made:
25/4 - 14/4 = 11/4 dozen
To find out how many cookies this represents, we need to multiply by the number of cookies in one dozen.
There are 12 cookies in one dozen, so:
11/4 x 12 = 33
Therefore, the guests ate 33 cookies.
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Consider the following joint discrete probability mass function (pmf):
p(x,y) = 0.1 for (x, y) = (1, 1), (2, 1), (1, 2), and (2, 2)
p(x,y) = 0.2 for (x, y) = (0, 0)
p(x,y) = 0.4 for (x, y) = (3, 3)
a. Obtain conditional pmf of X when Y = 1.
b. Clearly showing all of your calculations, calculate the correlation coefficient for X and Y.
so correlation coefficient = σ^XY/σ^Xσ^Y = 1.225 / 1.36 = 0.9
Step-by-step explanation:
a) We need to find the conditional p m f of X when Y = 1.
So, when Y = 1, there are only two X values: X =1 and X =2.
X can have any of the following values: 0, 1, 2, or 3
so P(0) = 0/ 0.2 = 0
P(1) = 0.1/(0.1+0.1) = 0.5
P(2) = 0.1/( 0.1+ 0.1) = 0.5
P(3) = 0/ 0.2 = 0
b) The correlation coefficient of X and Y isρXY
ρ^XY=(X,Y)=(X,Y)/σ^Xσ^Y=σ^XY/σ^Xσ^Y
We will calculate σ^X first by μ^x
f x(x) = 0.2; x = 0
= 0.2; x =1
= 0.2 ; x = 2
= 0.4 ; x = 3
μ^x = 0.2 * 0 + 0.2 * 1 + 0.2 * 2 + 0.4 * 3 = 1.8
σ^X^ 2 = 0.2 * 1.82 + 0.2 * 0.82 + 0.2 * 0.22 + 0.4 * 1.22 = 1.36
σ^X = 1.166
We will calculate σ^y first by μ^y
f^ x (X) = 0.2; y = 0
= 0.2; y =1
= 0.2 ; y= 2
= 0.4 ; y = 3
μ^y = 0.2 * 0 + 0.2 * 1 + 0.2 * 2 + 0.4 * 3 = 1.8
σ^y^ 2 = 0.2 * 1.82 + 0.2 * 0.82 + 0.2 * 0.22 + 0.4 * 1.22 = 1.36
σ^y = 1.166
Now we will calculate σ^XY
σ^2^XY = 0.4 * ( 3 - 1.8)* ( 3-1.8) + 0.2 *( 0 -1.8) * ( 0 - 1.8) + 0.1 * ( 1- 1.8) * ( 1- 1.8) + 0.1 * ( 2 -1.8) * ( 1 -1.8) + 0.1 * ( 1 - 1.8) * ( 2 - 1.8) + 0.1 * ( 2 - 1.8) * ( 2 - 1.8) = 1.26
σ^XY = 1.225
so correlation coefficient = σ^XY/σ^Xσ^Y = 1.225 / 1.36 = 0.9
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URGENT please help (due very soon)
Answer:
the answer to your question will be 252
2/5 of employees in a company drive to work, 1/3 travel by bus and the rest walk. 1. Find the fraction of who walk.
Answer:
4/15
Step-by-step explanation:
2/5 drive
1/3 bus
and rest walk
fraction of those who walk is 1-(2/5+1/3)
2/5+1/3=(6+5)/15=11/15
15/15-11/15=4/15
A sample of 10 NCAA college basketball game scores provided the following data. Winning Team
Sketch the graphs of the following equations. y=x +5, y = -(x + 5), and y=|x +5|
Answer: below
Step-by-step explanation:
The first equation y = x + 5 is the equation of a straight line with slope 1 and y-intercept 5. We can plot this line by starting at the point (0, 5) and then moving up one unit for every one unit to the right.
The second equation y = -(x + 5) is also the equation of a straight line, but with slope -1 and y-intercept -5. We can plot this line by starting at the point (0, -5) and then moving down one unit for every one unit to the right.
The third equation y = |x + 5| is the equation of a V-shaped graph, or an absolute value function, centered at x = -5. We can plot this graph by first plotting the portion of the graph for x < -5, which is given by y = -(x + 5). Then, we can plot the portion of the graph for x > -5, which is given by y = x + 5. Finally, we can connect these two portions of the graph at x = -5 by drawing a vertical line segment from (-5, 0) to (-5, 10).
Answer:
First, let's start with y = x + 5.
To graph this equation, we can use a table of values. We'll choose a few values of x, and then plug them into the equation to find the corresponding values of y.
x | y
--|---
-5 | 0
-4 | 1
-3 | 2
-2 | 3
-1 | 4
0 | 5
1 | 6
2 | 7
3 | 8
4 | 9
5 | 10
Now, we can plot these points on a graph and connect them with a straight line.
```
| *
10|
| *
| *
| *
|*
| -------------
| -5 -4 -3 -2 -1 0 1 2 3 4 5
```
This is the graph of y = x + 5.
Next, let's look at y = -(x + 5).
This equation is similar to the first one, but with a negative sign in front of the parentheses. This means that the graph will be a mirror image of the first one, reflected across the y-axis.
So, we already know some of the points on this graph. If we take the points from the first graph and flip them horizontally (i.e. change the sign of the x-coordinate), we'll get the points for the second graph.
x | y
--|---
5 | 0
4 | -1
3 | -2
2 | -3
1 | -4
0 | -5
-1 | -6
-2 | -7
-3 | -8
-4 | -9
-5 | -10
Plotting these points on a graph and connecting them with a straight line, we get:
```
|*
10| *
| *
| *
| *
| *
| *
| *
|---------------
| -5 -4 -3 -2 -1 0 1 2 3 4 5
```
This is the graph of y = -(x + 5).
Finally, let's look at y = |x + 5|.
This equation involves absolute value, which means that the graph will be "V"-shaped. The vertex of the "V" will be at x = -5.
To find some points on this graph, we can again use a table of values. We'll choose some values of x, and then plug them into the equation, being careful to take the absolute value of the result.
x | y
--|---
-10 | 5
-5 | 0
0 | 5
5 | 10
10 | 15
Now, we can plot these points on a graph and connect them to form a "V" shape.
```
| *
15| *
| *
| *
| *
| *
|-------------
|-10 -5 0 5 10
```
This is the graph of y = |x + 5|.
(30 points) The fixed costs of manufacturing basketballs in a factory are $1,400.00 per day. The variable costs are $5.25 per basketball. Which of the following
expressions can be used to model the cost of manufacturing b-basketballs in 1 day?
O $1,405.25b
o $5.25b-$1,400.00
O $1,400.00b+$5.25
O $1,400.00-$5.25b
The correct expression to model the cost of manufacturing b basketballs in 1 day is:
O $5.25b-$1,400.00
The fixed costs of manufacturing the basketballs are $1,400.00 per day, and the variable costs are $5.25 per basketball. To find the total cost of manufacturing b basketballs in 1 day, you need to add the fixed costs and the variable costs for each basketball.
The variable costs for b basketballs would be $5.25 * b. To find the total cost, you need to subtract the fixed costs of $1,400.00 from this amount. This can be represented by the expression $5.25b - $1,400.00.
The other expressions do not correctly represent the cost of manufacturing b basketballs in 1 day because they do not correctly account for both the fixed costs and the variable costs.
Write the equation of the line that passes through the points (-9, -8) and (–6,6).
Put your answer in fully reduced point-slope form, unless it is a vertical or horizontal
line.
Answer:
Slope - intercept form \(y = \frac{14}{3} x + 34\)
Step-by-step explanation:
Explanation:-
Given points are ( -9 ,-8 ) and (-6,6)
slope of given two points
\(m = \frac{y_{2} -y_{1} }{x_{2}-x_{1} } = \frac{6-(-8)}{-6-(-9)} = \frac{14}{3}\)
The equation of the straight line passing through the points and having slope
\(y - y_{1} = m ( x - x_{1} )\)
\(y - (-8) = \frac{14}{3} ( x - (-9) )\)
3 y + 2 4 = 14 x + 126
3 y = 14 x + 126 - 24
3 y = 14 x + 102
\(y = \frac{14}{3} + \frac{102}{3}\)
\(y = \frac{14}{3} x + 34\)
Slope - intercept form y= mx +C
Slope - intercept form \(y = \frac{14}{3} x + 34\)
Please Solve, Thank you!
Answer:
1711
Step-by-step explanation:
\(4\cdot(14+8)^2-9\cdot(9-4)^2\\=4\cdot(22)^2-9\cdot(5)^2\\=4(484)-9(25)\\=1936-225\\=1711\)
Make sure to follow order of operations!
test for an association between handeness and career for these 5 professions. state the null and alternative hypothesis
Null Hypothesis: There is no association between handedness and career for Accountants. And Alternative Hypothesis: There is an association between handedness and career for Accountants.
Profession 1: Lawyer
Null Hypothesis: There is no association between handedness and career for Lawyers.
Alternative Hypothesis: There is an association between handedness and career for Lawyers.
Profession 2: Pilot
Null Hypothesis: There is no association between handedness and career for Pilots.
Alternative Hypothesis: There is an association between handedness and career for Pilots.
Profession 3: Accountant
Null Hypothesis: There is no association between handedness and career for Accountants.
Alternative Hypothesis: There is an association between handedness and career for Accountants.
Profession 4: Nurse
Null Hypothesis: There is no association between handedness and career for Nurses.
Alternative Hypothesis: There is an association between handedness and career for Nurses.
Profession 5: Teacher
Null Hypothesis: There is no association between handedness and career for Teachers.
Alternative Hypothesis: There is an association between handedness and career for Teachers.
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27. Two sisters are 7 years apart in age. The product of their ages is 260 years. What is the age of the older sister.
a. 14 years
b. 21 years
C. 13 years
d. 20 years.
f John consistently makes $1200 deposit into his saving account every year, how many years would it take for John to have his first $1,000,000? (Round your answer up to the nearest whole number.)
Answer:
834 years.
Step-by-step explanation:
Let \(y\) equal years.
Construct an equation:
\(1200y=1000000\)
Divide both sides of the equation by the coefficient of \(y,\) which is \(1200\):
\(y=833.3333...\\\)
Round up to the nearest whole number:
\(y=834\)