Answer:
0.574% each
Step-by-step explanation:
1/2 : 87 = 0.00574
0.00574 * 100 = 0.574% each
Find the critical value t* for the following situations.
a) a 98% confidence interval based on df=27
b) a % confidence interval based on df=7
a) What is the critical value of t for a 98�
The critical value of the t-distribution, with a 98% confidence level and 27 df, is given as follows:
t* = 2.4727.
How to obtain the critical value of the t-distribution?To obtain the critical value of the t-distribution, we must insert these following parameters into a two-tailed t-distribution calculator:
Degrees of freedom.Significance level.The parameters for this problem are given as follows:
27 df.1 - 0.98 = 0.02 significance level.Hence the critical value is given as follows:
t* = 2.4727.
Missing InformationItem b is incomplete, however a similar procedure to item a must be used to obtain the critical value.
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Daria is purchasing a $75 appliance for her kitchen. She has three
coupons to the store that she can choose from. Which is a true statement
about Daria's options? *
Coupon 1: $10 off purchase
Coupon 2: 15% off purchase
Coupon 3: 1 off purchase
Answer: coupond 3 offers the best sale price of $60
Step-by-step explanation:
Help with this question pls , use answer choices
Answer:
B.) 3√15
Step-by-step explanation:
a^2 + b^2 = c^2
x^2 + 11^2 = 16^2
x^2 + 121 = 256
x^2 = 256 - 121
x^2 = 135
√x^2 = √135
√135 = √9 • √15
√9 = 3
√15 = √15
3√15
The scale factor of two similar polygons is given. Find the ratio of their perimeters and the ratios of their areas.
1) 3:1
2) 7/4
The ratios of their perimeters and the ratios of their areas are 1) 3:1 and 9:1 and 2) 7:4 and 49:16.
Given the scale factor of two similar polygons, we need to find the ratio of their perimeters and the ratios of their areas,
To find the ratio of the perimeters of two similar polygons, we can simply write the scale factor as it is because the ratio of the perimeter is equal to the ration of the corresponding lengths.
1) So, perimeter = 3:1
The ratio of areas between two similar polygons is equal to the square of the scale factor.
Since the scale factor is 3:1, the ratio of their areas is:
(Ratio of areas) = (Scale factor)² = 9/1 = 9:1
Similarly,
2) Perimeter = 7:4
Area = 49/16
Hence the ratios of their perimeters and the ratios of their areas are 1) 3:1 and 9:1 and 2) 7:4 and 49:16.
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Stanley runs, swims, and bikes every day. During these workouts, heruns at 9 mph, bikes at 16 mph, and swims at 2.5 mph. Yesterday, he ranfor half an hour longer than he swam, and his biking time was twice hisrunning time. How long did Stanley run, swim, and bike yesterday if thetotal distance he covered was 64 miles
Equations
Let's call:
x = time Stanley swam yesterday.
We know he ran for half an hour longer than he swam, thus the time he ran was:
x + 0.5 = time Stanley ran yesterday
We also know he biked for twice the time he ran, thus:
2(x + 0.5) = time Stanley biked yesterday.
The distance covered by Stanley when swimming is
2.5*x
The distance covered by Stanley when running is:
9*(x+0.5)
The distance covered by Stanley while biking is:
16*2*(x + 0.5) = 32(x + 0.5)
The total distance is 64 miles, thus:
2.5*x + 9*(x+0.5) + 32(x + 0.5) = 64
Operating:
2.5x + 9x + 4.5 + 32x + 16 = 64
Simplifying:
43.5x + 20.5 = 64
Subtracting 20.5:
43.5x = 43.5
Thus:
x = 1
Stanley swam for 1 hour, he ran for 1+0.5 = 1.5 hours and biked for 2*1.5=3 hours
Swam: 1 hour, Ran: 1.5 hours, Biked: 3 hours
Please help with geometry question
Answer:
<U=70
Step-by-step explanation:
Straight line=180 degrees
180-120
=60
So, we have 2 angles.
60 and 50
180=60+50+x
180=110+x
70=x
So, U=70
Hope this helps! :)
Solve following equation. 3/2x = 3x/8
To solve the equation (3/2)x = (3x)/8, we can start by cross-multiplying to eliminate the fractions:
8 * (3/2)x = 3x
Simplifying further, we have:
12x = 3x
Next, we can isolate the variable x by subtracting 3x from both sides:
12x - 3x = 0
Simplifying the left side of the equation, we get:
9x = 0
Finally, dividing both sides by 9 gives us the solution:
x = 0
Therefore, the solution to the equation (3/2)x = (3x)/8 is x = 0.
To solve the equation, we applied the cross-multiplication method to eliminate the fractions. Cross-multiplication involves multiplying the numerator of one fraction by the denominator of the other and vice versa. By multiplying both sides of the equation by the denominators (2 and 8) and cross-multiplying, we obtain an equation without fractions.
After cross-multiplying, we simplify the equation by performing arithmetic operations. In this case, we multiply 8 by (3/2)x to obtain 12x, and we multiply 3x by 2 to get 6x. Thus, the equation becomes 12x = 6x.
To isolate the variable x, we subtract 6x from both sides of the equation, resulting in 12x - 6x = 0. Combining like terms gives us 6x = 0.
Finally, we divide both sides of the equation by the coefficient of x, which is 6. This step yields the solution x = 0.
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313
Which of these is a unit of measure for the mass of a bag of apples?
А
kilogram
B
kilometer
с
cubic inches
D
square inches
Answer:
A
Step-by-step explanation:
I hope this is correct and have a great day
9 4/5 divided by 5 8/11
Answer:
Step-by-step explanation:
392/275 as a fraction
I'll always give away 5 stars, thanks and Brainliest to the answer that's correct!
Naruto has a baseball card that is worth $45. The value of the card is increasing at the rate of 1.5% per year. How much will the card be worth in 15 years?
A: $366.17
B: $56.26
C: $89.21
D: $263.97
Answer:
a I believe sorry if I'm wrong
Answer:
I think its B: $56.26
What is the expression in factored form?
−12.4(13)+(19.3)(−12.4)
Answer: -12.4(13+19.3)
Step-by-step explanation: I took the quiz
The expression −12.4 (13) + (19.3) (−12.4) in the factored form will be (−12.4) and (32.3).
What is factorization?It is a method for dividing a polynomial into pieces that will be multiplied together. At this moment, the polynomial's value will be zero.
It is also known as the product. If the object n is given to m times then we just simply multiply them.
The expression is given below.
⇒ −12.4 (13) + (19.3) (−12.4)
Taking (−12.4) common from both terms. Then we have
⇒ (−12.4)(13 + 19.3)
⇒ (−12.4)(32.3)
The expression −12.4 (13) + (19.3) (−12.4) in the factored form will be (−12.4) and (32.3).
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median and range
math question
One-fifth of the greater of two consecutive Integers is 7 less than one-half of the lesser Integer. What are the integers?
The two consecutive integer numbers are 24 and 25.
How to find the two consecutive integers?
We can write the two consecutive integers as x and x + 1, where the larger one is x + 1.
We know that 1/5 of the larger is 7 less than 1/2 of the lesser one, then we can write the linear equation:
1/5*(x + 1) = 1/2*x - 7
1/5*x + 1/5 = 1/2*x - 7
So we need to solve that for x:
1/5 + 7 = 1/2*x - 1/5*x
1/5 + 35/5 = 5/10*x - 2/10*x
36/5 = 3/10*x
(36/5)*(10/3) = x = 24
So the smaller is 24, and the larger is x + 1 = 25.
The two consecutive integer numbers are 24 and 25.
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Which statement is true about angles 1 and 2?
Answer:
Angles 1 & 2 are adjacent
Step-by-step explanation:
MARKING BRAINLEIST IF CORRECT ASAP
a) x ^ 2 + 2x???????????
Step-by-step explanation:
x² + 2x
x(x + 2)
OR
x² + 2x = 0
x(x + 2) = 0
x = 0 or x + 2 = 0
x = 0 or x = - 2
Prove or disprove the statement: "If the product of two integers is even, one of them has to be even".
The statement "If the product of two integers is even, one of them has to be even" is true and can be proven.
It is known that an even number is any integer that is divisible by 2. So, if the product of two integers is even, then it must be divisible by 2. According to the fundamental theorem of arithmetic, every integer can be expressed uniquely as a product of prime numbers.
So, let's assume that the product of two integers is even and neither of them is even. This means that both integers must be odd and can be expressed in the form 2n + 1, where n is any integer. Thus, their product can be expressed as:(2n + 1)(2m + 1) = 4mn + 2m + 2n + 1 = 2(2mn + m + n) + 1This expression is odd because it cannot be divided by 2 without leaving a remainder. Therefore, the product of two odd integers is odd and not even.
Hence, it can be concluded that if the product of two integers is even, then at least one of them has to be even, as proven.
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If C = C(q) is a firm's total cost function, the quantity epsilon_{c} = q/C * (dC)/(dq) is called the elasticity of cost at the output q . Discuss the relationship between marginal cost and average cost for the intervals of being higher and lower than 1 (15 points). epsilon_{c}
Answer:
the answer is 5,746 = c
Step-by-step explanation:
Please solve this simultaneous equation, i'm not that good at it.
2r-s=10
rs-s^2=12
Answer:
s = 6, r = 8 or s = 4, r = 7
Step-by-step explanation:
2r - s = 10
2r = 10 + s
r = 5 + s/2 --(1)
rs - s^2 = 12 --(2)
sub (1) into (2):
(5 + s/2)s - s^2 = 12
5s + 0.5s^2 - s^2 = 12
-0.5s^2 + 5s - 12 = 0
s^2 - 10s + 24 = 0
(s - 6)(s - 4) = 0
therefore s = 6 or s = 4
when s = 6, r = 8 and when s = 4, r = 7
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7. A portrait without its frame has
a height 1.5 times its width w,
in inches. Its frame is 4 in. wide
all along its perimeter. What is
an expression for the area of the
framed portrait in terms of w?
Simplify your expression and write
it in standard form.
The expression for the area of the framed portrait in terms of w is: A = \(1.5w^{2}\) + 12w + 64.
How to simplify an expression?Simplifying an expression means to write it in its simplest form by combining like terms and removing any redundant or unnecessary elements. There are several techniques you can use to simplify expressions, including:
Combining like terms: Like terms are terms that have the same variable raised to the same power. For example, 2x and 4x are like terms. To simplify an expression, you can add or subtract like terms.
Distributing: Distributing means multiplying a constant or variable by each term within a set of parentheses. For example, if you have the expression 2(x + 3), you can distribute the 2 to each term within the parentheses: 2x + 6.
Factoring: Factoring means finding a common factor among a set of terms and grouping them together. For example, if you have the expression \(x^{2}\) + 4x, you can factor out the x: x(x + 4).
Simplifying rational expressions: Rational expressions are expressions that have one fractional term. To simplify a rational expression, you can cancel out common factors in the numerator and denominator.
Let's call the width of the portrait w and the height h. We know that the height of the portrait is 1.5 times its width, so h = 1.5w.
The area of the portrait is the product of its width and height: A = w * h = w * 1.5w = \(1.5w^{2}\).
The width of the frame is 4 inches all along its perimeter, so the total width of the framed portrait is w + 4 + 4 = w + 8.
The total height of the framed portrait is h + 4 + 4 = h + 8 = 1.5w + 8.
The area of the framed portrait is the product of its width and height: A = (w + 8) * (1.5w + 8) = (w + 8) * 1.5w + 8 * (w + 8) = 1.5w^2 + 12w + 64.
So, the expression for the area of the framed portrait in terms of w is: A = \(1.5w^{2}\) + 12w + 64.
This expression is already in standard form.
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Ed is 5 years older than his wife. The sum of their ages is 59. How old is Ed? How old is his wife? Ed age: Wife age:
Answer:
ede 5 years old er = wife 25 Ed 34
What is the sum of (x ^ 2 - 3x + 2) and (5x ^ 2 - 3x - 8)
Answer:
6x^2-6x-6
Step-by-step explanation:
(x^2-3x+2)+(5x^2-3x-8)
x^2+5x^2-3x+(-3x)+2+(-8)
6x^2-3x-3x+2-8
6x^2-6x+2-8
6x^2-6x-6
Betsy uses 8.8 of blue paint and white paint to paint her bedroom walls. 1/4 of this amount is blue paint. And th rest is white how many pints of white paint did she use to paint her bedroom walls
Answer:
6.6 pints of white paint is used to paint the bedroom walls
Step-by-step explanation:
Pints of blue paint used to paint the bedroom walls = 8.8
Ratio of blue paint used = \(\frac{1}{4}\)
Therefore,
Ratio of white paint used = \(1-\frac{1}{4}=\frac{3}{4}\)
Pints of white paint used to paint the bedroom walls = \(\frac{3}{4}(8.8)=3(2.2)=6.6\)
Therefore,
6.6 pints of white paint is used to paint the bedroom walls.
a person is standing next to a hot air balloon. at the same time, the person starts moving away from the balloon at 5 ft/sec and the balloon rises straight into the air at a rate of 12 ft/sec. is the distance between the person and the balloon increasing or decreasing 4 seconds after they start moving?
Comparing the distances at 3 seconds (39 ft) and 4 seconds (51.96 ft), we can conclude that the distance between the person and the balloon is increasing after 4 seconds.
Let's analyze the situation using the given terms "person", "moving", and "distance".
At the 4-second mark:
1. The person has moved horizontally away from the balloon at a rate of 5 ft/sec.
2. The balloon has risen vertically at a rate of 12 ft/sec.
To determine if the distance between the person and the balloon is increasing or decreasing, we can use the Pythagoras Theorem to find the diagonal distance between them.
After 4 seconds:
- The person has moved 5 ft/sec × 4 sec = 20 ft horizontally.
- The balloon has risen 12 ft/sec × 4 sec = 48 ft vertically.
Now, we can use the Pythagorean theorem to find the distance between the person and the balloon:
distance² = horizontal distance² + vertical distance²
At 4 seconds:
distance² = (20 ft)² + (48 ft)²
distance² = 400 + 2304
distance² = 2704
distance = √2704 ≈ 51.96 ft
Now let's check the distance at 3 seconds:
- The person has moved 5 ft/sec × 3 sec = 15 ft horizontally.
- The balloon has risen 12 ft/sec × 3 sec = 36 ft vertically.
distance² = (15 ft)² + (36 ft)²
distance² = 225 + 1296
distance² = 1521
distance = √1521 = 39 ft
Comparing the distances at 3 seconds (39 ft) and 4 seconds (51.96 ft), we can conclude that the distance between the person and the balloon is increasing after 4 seconds.
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please be quick !! this is due in 30 minutes !!
Simplify the expression: (7x - 8)(-5)
Answer:
-35x + 40
Step-by-step explanation:
Re-arrange: -5(7x - 8)Apply the distributed property, so it now looks like this: -35x - -40Simplify: -35x + 40I hope this helps!
Maria has $40, which is 170% of the amount that Kelly has. How much money, in dollars, does Kelly have?
Answer:
Step-by-step explanation:
I haven't done percentages in a while but the answer after I did it would 15 dollars from where I rounded it. You multiply 15 by 270% which is 2.7 and that's the closest to 40. So Kelly would have 15 dollars.
(Fact check me math people)
four identical red balls and two identical black balls are placed in a box. one ball is randomly selected. without replacement, the second ball is selected. what is the probability that at least one of the balls is red.
The probability that atleast one ball is red is 14/15.
Given that:-
Number of red balls = 4
Number of black balls = 2
One ball is randomly selected, without replacement, the second ball is selected.
We have to find the probability that atleast one ball is red.
There are four ways in which this can happen:-
RR, BR, RB, BB
Where R stands for Red ball and,
B stands for Black ball.
We know that,
Probability that no ball is red + Probability that atleast one ball is red = 1
Hence, we can write,
Probability that atleast one ball is red = 1 - Probability that no ball is red
P(BB) = (2/6)*(1/5) = 1/15
Hence,
Probability that atleast one ball is red = 1 - (1/15) = 14/15
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Use polar coordinates to find the volume of the given solid.
Below the paraboloid z = 18 − 2x² − 2y² and above the xy-plane
V = π [(3(\(\sqrt{18/2}\))³/1) - (2(\(\sqrt{18/2}\))⁵/15)] - π [0]
Simplifying this expression will give us the final volume of the solid.
, we need to evaluate the triple integral:
V = ∫₀²π ∫₀ᵣ ∫(18 - 2r²) r dz dr dθ
Integrating with respect to z first, we have:
V = ∫₀²π ∫₀ᵣ (18 - 2r²) r dr dθ
Integrating the volume with respect to r, we get:
V = ∫₀²π [(9r² - 2/3r⁴)]ᵣ₀ dθ
Simplifying the expression inside the brackets and evaluating the integral, we have:
V = ∫₀²π (9r² - 2/3r⁴) dθ
V = π [(9/3)r³ - (2/15)r⁵]ᵣ₀
V = π [(3r³/1) - (2r⁵/15)]ᵣ₀
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How many different 5-digit PIN codes are there that only include the digits 7, 2, 4, 6, 9 and 3?
Answer:
720
Step-by-step explanation:
6*5*4*3*2=720