Ask question

Ask question

All categories

love history [14]

3 years ago

7

The Jets are driving 30 miles per gallon of gas. they are traveling 7 hours at 55 miles per hour. how much gas do they need

1 answer:

harkovskaia [24]3 years ago

8 0

First you need to find the total amount of miles they will be flying. This can be found by multiplying the rate or 55 by the time or 7. This would be 385 miles. Next you would divide by the miles per gallon or 30 to get the total number gallons needed. This would be 12.833333...
or 13 gallons if rounded to the nearest whole number.

You might be interested in

A school has over 500 students, 30 English teachers, and 20 math teachers. What is the ratio between the number of math teachers

aliina [53]

The ratio is 1:25 (simplified) or 20:500

6 0

3 years ago

Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sampl

kompoz [17]

Complete Question

Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sample of 15 students, the professors find the mean number of headaches is 19 and the standard deviation is 1.7. Assume the population distribution of number of headaches is normal.the correct conclusion at $\alpha =0.001$ is?

Answer:

There is no sufficient evidence to support the professor believe

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 18$

The sample size is $n = 15$

The sample mean is $\= x = 19$

The standard deviation is $\sigma = 1.7$

The level of significance is $\alpha = 0.001$

The null hypothesis is $H_o: \mu = 18$

The alternative hypothesis is $H_a : \mu > 18$

The critical value of the level of significance from the normal distribution table is

$Z_{\alpha } = 3.290527$

The test hypothesis is mathematically represented as

$t = \frac{\= x - \mu }{ \frac{\sigma}{ \sqrt{n} } }$

substituting values

$t = \frac{ 19 - 18}{ \frac{1.7}{ \sqrt{15} } }$

$t = 2.28$

Looking at the value of t and $Z_{\alpha }$ we can see that $t < Z_{\alpha }$ so we fail to reject the null hypothesis.

This mean that there is no sufficient evidence to support the professor believe

3 0

3 years ago

two angles are a linear pair. the measure of the first angle minus 39 is equal to twice the measure of the second angle. What ar

baherus [9]

Step-by-step explanation:

Linear pairs = 180°!!!!!

1st angle is 2[x]-39 2nd angle is just x
soooo add the x. 3x-39=180
3x=141 x=47

X is just the second angle!!!!!

lol. i toonk geo last year and i cant believe i still remember all this hopefully i got it right!

8 0

3 years ago

What is 4 over 6 divided by 2 over 4?

djverab [1.8K]

4/3 /......................................................../

7 0

3 years ago

What is the equation

Varvara68 [4.7K]

I bealive if it is the nature of the slope in unison comparing y-intercept elgebra it is Y=3x-3/4

8 0

3 years ago