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prohojiy [21]
3 years ago
15

Can someone help me on this please and thank you!

Mathematics
1 answer:
krok68 [10]3 years ago
5 0
1. Given
2.CA bisects < bad
3. 4.reflextive
5. Sas
6. Cpctc
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Mileage tests are conducted for a particular model of automobile. If a 98% confidence interval with a margin of error of 1 mile
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Answer: 37

Step-by-step explanation:

Given : Significance level : \alpha:1-0.98=0.02

Critical value : z_{\alpha/2}=z_{0.01}=2.33

margin of error : E= 1 mile per gallon

Population standard deviation: \sigma=2.6 miles per gallon.

We know that when the population standard deviation is known then the formula to find the sample size is given by  :

n=(\dfrac{z_{\alpha/2}\times \sigma}{E})^2

n=(\dfrac{(2.33)\times 2.6}{1})^2=36.699364\approx37  [Round to the next whole number.]

Hence, the required number of automobiles should be used in the test = 37

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3 years ago
Mrs. Gomes found that 40% of students at her high school take chemistry. She randomly surveys 12 students. What is the probabili
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Binomial formula is :
P ( k = 4 ) = nCk * p ^{k}(1-p) ^{n}= \\ =495 * 0.4 ^{4}* ( 0.6 ) ^{8}=
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= 0.21284 ≈ 0.213
Answer: C ) 0.213
3 0
3 years ago
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The graph shows a city’s expected population for a number of years after a census. Which is the best prediction of the city’s po
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245,000 is the answer please give brainliest

Step-by-step explanation:

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3 years ago
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Marvin rides his bike at an average speed of 13 miles per hour how far can he bike in 8 hours?
Radda [10]

13 x 8 = 104

104 miles

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3 years ago
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If 3t -7 = 5t, then 6t =
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Answer:

21

Step-by-step explanation:

3t-7=5t

subtract 3t from both sides

-7 = 2t

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-21 = 6t

so 6t = -21

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2 years ago
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