Answer:
a) The car will be worth $8000 after 2.9 years.
b) The car will be worth $6000 after 4.2 years.
c) The car will be worth $1000 after 12.7 years.
Step-by-step explanation:
The value of the car after t years is given by:
\(V(t) = 14651(0.81)^{t}\)
According to the model, when will the car be worth V(t)?
We have to find t for the given value of V(t). So
\(V(t) = 14651(0.81)^{t}\)
\((0.81)^t = \frac{V(t)}{14651}\)
\(\log{(0.81)^{t}} = \log{(\frac{V(t)}{14651})}\)
\(t\log{(0.81)} = \log{(\frac{V(t)}{14651})}\)
\(t = \frac{\log{(\frac{V(t)}{14651})}}{\log{0.81}}\)
(a) $8000
V(t) = 8000
\(t = \frac{\log{(\frac{8000}{14651})}}{\log{0.81}} = 2.9\)
The car will be worth $8000 after 2.9 years.
(b) $6000
V(t) = 6000
\(t = \frac{\log{(\frac{6000}{14651})}}{\log{0.81}} = 4.2\)
The car will be worth $6000 after 4.2 years.
(c) $1000
V(t) = 1000
\(t = \frac{\log{(\frac{1000}{14651})}}{\log{0.81}} = 12.7\)
The car will be worth $1000 after 12.7 years.
A rental car company charges $36.39 per day to rent a car and $0.09 for every mile driven. Miguel wants to rent a car, knowing that
He plans to drive 225 miles.
He has at most $480 to spend.
Which inequality can be used to determine x, the maximum number of days Miguel can afford to rent for while staying within his budget?
The inequality used to determine the maximum number of days Miguel can afford to rent while staying within his budget is 202.5 + 36.39x ≤ 480.
What is an inequality?
An inequality is a comparison between two or more mathematical expressions. It can be of the form ≤, ≥, < or >.
We are given per day charges as $36.39 and the charges per mile as $0.90.
Also, it is given that in total 225 miles have been driven.
So, the charges of 225 miles are:
⇒225 x 0.90
⇒$202.5
It is given that he can spend maximum $480.
So, for the maximum number of x days, we get the inequality as
202.5 + 36.39x ≤ 480
Hence, the inequality used to determine the maximum number of days Miguel can afford to rent while staying within his budget is
202.5 + 36.39x ≤ 480.
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subtracting linear expressions
6. B. 2x + 6
7. A. 4x + 5
8. B. 3x + 10
9. C. This is because like terms are terms that have the same variables, for example: 6x - 9x, 12y - 4y, 3a + 5a. In the other choices, we can see that they are unlike terms, not like terms.
choose the sentence that complete the fact family 5×6=30 30÷6=5 6×5=30 which one is correct a 30÷5=6 b 30÷3 =10 c 6÷2=3 d 30÷15=2 is it abc or d
Answer:
a 30÷5=6
Step-by-step explanation:
Because from the fact the numbers that were used were 5,6and30.
they solved for 5×6=30,30÷6=5and6×5=30. which means it is left with 30÷5=6.
hope this helps.
Since the degree of the numerator is less than the degree of the denominator, we don't need to divide. We factor the denominator as
Answer:
As given,
I = \(\int\limits {\frac{3x}{x^{2} - 2x} } \, dx\)
Since the degree of the numerator is less than the degree of the denominator, we don't need to divide.
We factor the denominator as x(x-2)
The partial fraction decomposition is
\(\frac{3x}{x^{2} - 2x} = \frac{3x}{x(x-2)} = \frac{A}{x} + \frac{B}{x-2}\\ = \frac{A(x-2) + B(x)}{x(x-2)} \\\)
we get
3x = A(x-2) + B(x)
⇒3x = x(A+B) - 2A
By comparing , we get
A+ B = 3 , -2A = 0
⇒A = 0 and B = 3- A = 3-0 = 3
∴ we get
A = 0, B = 3
Therefore, the integral become \(\int\limits {\frac{3x}{x^{2} - 2x} } \, dx = \int\limits {[\frac{0}{x} + \frac{3}{x-2} ] } \, dx\)
what is the most effluence first step to isolate the variable term on one side of this equation -9x=-4x+5
Please help me I don’t understand this
Answer:
the required answer are -8,0,4
Decide whether you would use a permutation, a combination, or neither. Next, write the solution using permutation notation or combination notation, if possible, and, finally, answer the question.
In how many ways can four taxi drivers be assigned to six cars?
ways
There are 360 ways tο assign fοur taxi drivers tο six cars.
What is Permutatiοn?A permutatiοn is an arrangement οf οbjects in a definite οrder. The members οr elements οf sets are arranged here in a sequence οr linear οrder. Fοr example, the permutatiοn οf set A={1,6} is 2, such as {1,6}, {6,1}. As yοu can see, there are nο οther ways tο arrange the elements οf set A.
In permutatiοn, the elements shοuld be arranged in a particular οrder whereas in cοmbinatiοn the οrder οf elements dοes nοt matter. Alsο, read: Permutatiοn And Cοmbinatiοn
We wοuld use a permutatiοn tο determine hοw many ways fοur taxi drivers can be assigned tο six cars. This is because the οrder in which the drivers are assigned tο the cars matters - assigning driver A tο car 1 is different frοm assigning driver A tο car 2.
The permutatiοn nοtatiοn fοr this prοblem is P(6,4), which represents the number οf permutatiοns οf 6 οbjects taken 4 at a time. Using the fοrmula fοr permutatiοns, we have:
P(6,4) = 6! / (6-4)! = 6! / 2! = 720 / 2 = 360
Therefοre, there are 360 ways tο assign fοur taxi drivers tο six cars.
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If f(x)=x² – 4x, what is the value of 2f(a-1)?
The correct value of 2f(a-1) is 2a^2 - 12a + 10.
To find the value of 2f(a-1), we need to substitute (a-1) into the function f(x) and then multiply the result by 2.
Given: f(x) = x^2 - 4x
Substituting (a-1) into the function:
f(a-1) = (a-1)^2 - 4(a-1)
Expanding and simplifying:
f(a-1) = (a^2 - 2a + 1) - (4a - 4)
f(a-1) = a^2 - 2a + 1 - 4a + 4
f(a-1) = a^2 - 6a + 5
Now, we multiply the result by 2:
2f(a-1) = 2(a^2 - 6a + 5)
Expanding:
2f(a-1) = 2a^2 - 12a + 10
Therefore, the value of 2f(a-1) is 2a^2 - 12a + 10.
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Match each expression with its equivalent expression.
a. √4x^2y^4
b. √8x^2y
c. √4x^2y
c. √16xy^2
d. √8xy^2
1. 2x√y
2. 2y√2x
3. 2xy^2
4. 2x√2y
5. 4y√x
Answer:
a -> 3
b -> 4
c -> 1
d -> 5
e -> 2
Step-by-step explanation:
We apply the properties to solve this question.
a. √4x^2y^4
\(\sqrt{4x^2y^4} = \sqrt{4}\sqrt{x^2}\sqrt{y^4} = 2xy^2\)
So a -> 3
b. √8x^2y
\(\sqrt{8x^2y} = \sqrt{8}\sqrt{x^2}\sqrt{y} = \sqrt{4*2}x\sqrt{y} = \sqrt{4}\sqrt{2}x\sqrt{y} = 2x\sqrt{2}\sqrt{y} = 2x\sqrt{2y}\)
So b -> 4
c. √4x^2y
\(\sqrt{4x^2y} = \sqrt{4}\sqrt{x^2}\sqrt{y} = 2x\sqrt{y}\)
So c -> 1
d. √16xy^2
\(\sqrt{16xy^2} = \sqrt{16}\sqrt{x}\sqrt{y^2} = 4\sqrt{x}y = 4y\sqrt{x}\)
So d -> 5
e. √8xy^2
\(\sqrt{8xy^2} = \sqrt{8}\sqrt{x}\sqrt{y^2} = \sqrt{4*2}\sqrt{x}y = \sqrt{4}\sqrt{2}\sqrt{x}y = 2y\sqrt{2}\sqrt{x} = 2y\sqrt{2x}\)
So e -> 2
I have two gold rings weighing 7.534g and 5,300 mg. Which is the heavier ring? By how much?
Answer:
7.534g ring is heavier, by 2.234g
Step-by-step explanation:
Note: mg =
\( {10}^{ - 3} grams\)
\(5300mg = ( \frac{5300}{ {10}^{3} } )g \\ = ( \frac{5300}{1000} )g \\ = 5.3g\)
From here we can see Ring A (7.534g) is heavier than Ring B(5,300mg)
Difference in Mass = 7.534g - 5.3g
= 2.234g
Sasha had −$70.12 in her bank account on Monday. She deposited $100.50 on Tuesday. She then purchased some groceries for $27.13 on Wednesday. How much did Sasha have left in her account on Thursday?
Answer:
maybe 0 dollars doesn't know
Answer:
-240.75
Step-by-step explanation:
-70.12-100.50=30.38
30.38- 271.13= -240.75
Which polynomial is prime? x2 + 9 x2 – 25 3x2 – 27 2x2 – 8
This is a sum of squares, which cannot be factored over the real numbers. You'll need to involve complex numbers to be able to factor, though its likely your teacher hasn't covered that topic yet (though I could be mistaken and your teacher has mentioned it).
Choice B can be factored through the difference of squares rule. Therefore, choice B is not prime.
Choice C and D can be factored by pulling out the GCF and then use the difference of squares rule afterward. So we can rule out C and D as well.
Answer:
A
Step-by-step explanation:
because it has a + sign
Four friends shared 7 chocolate bars. Each of them was given an equal share of the chocolate bars. How many chocolate bars did each person get?
Answer:
19. 25 chocolate bars
Step-by-step explanation:
77 divided by 4=19. 25
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Linh has red, white, and black shirts. She has khaki, black, and white pants. She does not wear the same color shirt and pants together and does not wear white with black. Can she make 8 outfits?
a
Yes
b
No
Answer:
b) no
Step-by-step explanation:
let's put all these options in columns to visualize:
shirts: pants:
red khaki
white black
black white
now i'll list all the combos without matching colors (shirt, pants)
red, khaki;
red, black;
red, white;
white, khaki;
white, black;
white, white;
black, khaki;
black, black;
black, white;
now, we need to get rid of any combos that consist of the same color and combos that consist of black and white paired together.
and we're left with:
red, khaki;
red, black;
red, white;
white, khaki;
black, khaki;
that's only 5 options, so no, she cannot make 8 outfits
A scientist is studying a bacterial colony that doubles in size every hour. The function f(x)=2^x models the number of cells, f(x) , after a given number of hours, x. The inverse function, f^-1 , models the number of hours, f^-1 (x) , required for the colony to reach x cells.
Use the graph of function f to identify f^-1 (x) for each x-value in the table. Then plot the points on the coordinate plane to graph the inverse of function f. Recall that for the inverse of a function, the values of the inputs and outputs are reversed.
1
2
4
8
16
Answer:
(1,0), (2,1), (4,2), (8,3), (16,4)
Step-by-step explanation:
For every point (a,b) that lies on the graph of function f, the point (b,a) must lie on the graph of its inverse. The points (1,0), (2,1), (4,2), (8,3), (16,4) and lie on the graph of function f. The points shown in the table lie on the graph of the inverse function,f^-1
Plato's Explanation.
Hope this helps!
A manufacturer has two options for making cube-shaped boxes. The cost is calculated by multiplying the surface area of the box by the cost per square inch of the cardboard. Answer parts a through c below.
The quadratic functions are: f(x) = 0.03x² for Design A and g(x) = 0.024x² for Design B.
Describe Quadratic functions?A quadratic function is a type of polynomial function of the form f(x) = ax² + bx + c, where a, b, and c are constants and x is the variable. In a quadratic function, the highest power of the variable is 2.
The graph of a quadratic function is a parabola, which is a U-shaped curve that opens either upwards or downwards depending on the sign of the coefficient a. If a > 0, the parabola opens upwards, and if a < 0, the parabola opens downwards. The vertex of the parabola, which is the point where the curve changes direction, is given by the coordinates (-b/2a, f(-b/2a)).
Quadratic functions have a wide range of applications in various fields such as physics, engineering, economics, and finance. For example, they can be used to model the motion of projectiles, the trajectory of a rocket, the shape of a bridge arch, the optimization of business profits, and the behavior of financial markets.
Let's assume that each side of the cube has a length of x inches. Then, the surface area of the cube is 6x² square inches.
a. For Design A with a cost of $0.005 per square inch, the total cardboard cost can be calculated using the quadratic function:
f(x) = 0.005(6x²) = 0.03x²
b. For Design B with a cost of $0.004 per square inch, the total cardboard cost can be calculated using the quadratic function:
g(x) = 0.004(6x²) = 0.024x²
Therefore, the quadratic functions are:
f(x) = 0.03x² for Design A
g(x) = 0.024x² for Design B
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The complete question is:
Don is 6 feet tall. At a given time of day, he measures his shadow to be 10 feet long.
At the same time, he measures the shadow length of a nearby tree to be 38 feet. How
tall is the tree?
Round your answer to the nearest whole foot.
Answer:
Ok, so with this problem, you would start with the equation 6/10=x/38.
Then, cross multiply:
38(6)=10x
After, you would:
38 x 6 = 228
Then:
228/10
Lastly:
x=22.8m which when rounded equals 23 ft.
You are given the great circle of a sphere is a length of 25 miles. What is the volume of the sphere
The volume of the sphere is approximately 3431.82 cubic miles.
To find the volume of a sphere, we need the radius of the sphere. The length of a great circle is the circumference of the sphere, which is related to the radius by the formula C = 2πr, where C is the circumference and r is the radius.
In this case, we are given that the length of the great circle is 60 miles. We can use this information to find the radius of the sphere.
C = 2πr
60 = 2πr
Divide both sides of the equation by 2π:
r = 60 / (2π)
r = 30 / π
Now that we have the radius, we can use the formula for the volume of a sphere:
V = (4/3)πr³
V = (4/3)π(30/π)³
V = (4/3)π(27000/π³)
V = (4/3)π(27000/π³)
V = (4/3)π(27000/π³)
V = (4/3)(27000/π²)
V = (4/3)(27000/9.87) (approximating π to 3.14)
V ≈ 3431.82 cubic miles
Therefore, the volume of the sphere is approximately 3431.82 cubic miles.
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Question
You are given the great circle of a sphere is a length of 60 miles. What is the volume of the sphere?
Solve the system of equations.
y=8x-6
y=5x+9
Answer:
x= 5 , y = 34
Step-by-step explanation:
8x-6=5x+9
3x-6=9
3x=15
x=5
-
8(x5) - 6 =
34
25(x5) +9 =
34
Answer:
x = 5 and y = 34
Step-by-step explanation:
I used substitution method and did this ;
8x - 6 = 5x + 9 .....put like terms together
8x - 5x = 9 + 6
3x = 15
x = 5
y = 8 (5) - 6
y = 40 - 6
y = 34
what decimal is equivalent to 41 over 100 (pls keep it simple i am only in 5th grade )
Answer: 0.41
Step-by-step explanation:
To find the decimal point of a fraction, divide the numerator (the top half of the fraction) by the denominator (the bottom half of the fraction).
41 over 100 as a decimal point would be 41 divided by 100
Which produces the equivalent decimal, 0.41
P.S this is also how you find the percent of a number. To get the percent, move the decimal point 2 digits over (0.41 to 41.) and then add the percentage sign to the end of the number (41%)
0.41 = 41%
so 41 over 100 is 0.41, and 41 is also 41% of 100 (per cent means per 100)
Best of luck in 5th grade :)
Suppose the travel time between two major cities A and B by air is 6 or 7 hr if the flight is nonstop; however, if there is one stop, the travel time would be 9, 10, or 11 hr. A nonstop flight between A and B would cost $1200, whereas with one stop the cost is only $550. Then between cities B and C, all flights are nonstop requiring 2 or 3 hours at a cost of $300.
The sample space of his travel times from A to C to be [8,9,10,11,12,13,14] and the sample space of his travel cost from A to C to be [850,1500].
Required:
If T=travel time from city A to city C, and S=cost of travel from A to C, what is the sample space of T and S?
Using it's concept, it is found that the sample space of T and S is:
{{8, [850-1500]}, {9, [850-1500]}, {10, [850-1500]}, {11, [850-1500]}, {12, [850-1500]}, {13, [850-1500]}, {14, [850-1500]}}
What is the sample space of an experiment?The sample space is the set that contains all possible outcomes for an experiment.
In this problem:
The sample space of T is: [8,9,10,11,12,13,14]The sample space of S is: [850,1500].Considering that for each time, the cost will be between $850 and $1500, the sample space for T and S is:
{{8, [850-1500]}, {9, [850-1500]}, {10, [850-1500]}, {11, [850-1500]}, {12, [850-1500]}, {13, [850-1500]}, {14, [850-1500]}}
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Stephan and John are reading the same book. Stephan reads 7 pages a day and is on page 22. John reads 9 pages a day and is on page 10. How many days until Stephan and John are on the same page? What page will they be on?
The number of days until Stephen and John are on the same page would be 6 days
The page they would be on would be 64 pages
How to find the number of days ?Assuming that the number of days can be denoted as x, the equation for the number of pages that Stephen has read in total is:
= 22 + 7 x
The number of pages that John has read in total is:
= 10 + 9 x
To find the number of pages, equate these:
22 + 7 x = 10 + 9x
22 - 10 = 9x - 7 x
12 = 2 x
x = 12 / 2
x = 6 days
The page they would be on is:
= 10 + 9 x
= 10 + 9 ( 6 )
= 64 pages
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10) Write an express to describe the following sentence then solve for that number:Four times a number is equal to two times that same number and 1611) Write an express to describe the following sentence then solve for that number:Two times a number is greater than half that number and 14.lesolsteini un mun sd blue
Explanation
Step 1
Let
x represents the number
Four times a number=4x
two times that same number=2x
is equal = "="
Step 2
replace
"Four times a number is equal to two times that same number and 16"
\(4x=2x+16\)Step 3
solve for x
\(\begin{gathered} 4x=2x+16 \\ \text{subtract 2x in both sides} \\ 4x-2x=2x+16-2x \\ 2x=16 \\ \text{divide each side by 2} \\ \frac{2x}{2}=\frac{16}{2} \\ x=8 \end{gathered}\)I hope this helps you
Can someone explain to me why the answer is 90 and not 1080? I think it has to do with the inches and ft. But I don’t remember how you solve it.
Answer:
You are correct
Step-by-step explanation:
You are correct sir. They want the answer in feet, so everything on that triangle has to be converted into feet.
There are 12 inches in a foot. If we do 108/12 we get 9 feet.
Darlene places $500 in a savings account that pays 4% interest. The amount, t years after 2005, can be modeled by the following equation. Elisa places $600 in a savings account that pays 5% interest. The amount, t years after 2005, can be modeled by the following table. t 0 5 10 15 20 f(t) $600 $766 $977 $1,247 $1,592 Based on these values, which account has the greater average rate of change between 2005 and 2015?
Elisa's savings account has the greater average rate of change between 2005 and 2015.
How to explain the rateFor Darlene's savings account, the initial amount in 2005 is $500. To calculate the value of the account in 2015, we need to know how many years have passed. Since 2015 is 10 years after 2005, we can substitute t = 10 into the equation given:
f(t) = 500(1 + 0.04t)
f(10) = 500(1 + 0.04(10))
f(10) = 500(1.4)
f(10) = 700
Therefore, the amount in Darlene's savings account in 2015 is $700. The average rate of change between 2005 and 2015 is the slope of the line connecting the points (0, 500) and (10, 700):
slope = (700 - 500) / (10 - 0) = 20
For Elisa's savings account, we are given the values of the function at several points, but we need to determine the slope of the line connecting the points (0, 600) and (10, 977), since this represents the change between 2005 and 2015. The slope is:
slope = (977 - 600) / (10 - 0) = 37.7
Therefore, Elisa's savings account has the greater average rate of change between 2005 and 2015.
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Which best describes the relationship between the line that passes through the points (–9, –7) and (–12, –2) and the line that passes through the points (1, 9) and (6, 6)?
9514 1404 393
Answer:
The lines are neither parallel nor perpendicular. They intersect in the 2nd quadrant.
Step-by-step explanation:
You have provided no descriptions, so we have shown the lines to let you draw your own conclusion regarding the description that best fits.
Suppose we have a random sample of size n = 5 from a continuous uniform distribution on the interval [0, 1]. Find the probability that the third largest observation in the
sample is less than 0.7.
The probability that the third largest observation in the sample is less than 0.7 is 0.2401 = 24.01%.
How do we calculate?The sample size n = 5,
Therefore the order statistics will be represented as X₁, X₂, X₃, X₄, and X₅.
Probability that X₃ is less than 0.7:
Since X₃ is the third largest observation = (X₁ and X₂) < 0.7.
The probability that X₃ is less than 0.7 is (0.7)² = 0.49.
The Probability that X₁ and X₂ < or equal to 0.7 is found as:.
The probability that both X₁ and X₂ are less than or equal to 0.7 is (0.7)² = 0.49 because in a continuous uniform distribution, the probability of any single observation being less than 0.7 is 0.7 - 0 = 0.7.
We then get the product of both cases:
Probability = 0.49 * 0.49 = 0.2401
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QUESTION 31 POINTThe area of a triangle is 18. The base is 6 inches. What is the height? Do not include units in your answer.
ANSWER:
6
STEP-BY-STEP EXPLANATION:
The area of a triangle is given by the following equation:
\(A=\frac{b\cdot h}{2}\)We replace and solve for h (height)
\(\begin{gathered} 18=\frac{6\cdot h}{2} \\ h=\frac{18\cdot2}{6} \\ h=6 \end{gathered}\)The height of the triangle is 6 inches
Need help with this please
Answer: for 10. the answer is 29y and 49y and for 11 the answer is 119 x 146y
Step-by-step explanation: Tutor verified) If you take 1-3x 57y92 you get 29y and if you get 5-4y 178x1 -119 wich is 146y
45% of a school brought in permission slips for Skateland. If the school received 150 permission slips, how many students are there in the school?
Step-by-step explanation:
What is 45% of 150?
Y is 45% of 150
Equation: Y = P% * X
Solving our equation for Y
Y = P% * X
Y = 45% * 150
Converting percent to decimal:
p = 45%/100 = 0.45
Y = 0.45 * 150
Y = 67.5
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