11. 300=12x (X being the number of gallons per miles)

12. It will take 30 gallons of gas to travel 750 miles (first divide 300 by 12, which gives you 25 miles per gallon. Then divide 750 by 25, which gives you 30 gallons to travel 750 miles)

13. It'll cost a total of $112.5 for gas to go on your trip. (Multiply 30(gallons)×3.75(cost of 1 gallon)= 112.5(total cost of gas)

7 0

3 years ago

An 6-sided die is rolled four times. What is the probability of rolling a six on all four rolls?

andrew-mc [135]

Answer:

4/6

Step-by-step explanation:

7 0

4 years ago

Read 2 more answers

Consider the e-billing case. The mean and the standard deviation of the sample of n = 65 payment times are xbar= 18.4730 and s =

Travka [436]

Answer: The null and the alternative hypotheses are given below:

$H_{0}:\mu=18.6$

$H_{a}:\mu$

Under null hypothesis, the test statistic is:

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

$=\frac{18.4730-18.6}{\frac{3.9045}{\sqrt{65}} }$

$=-0.26$

$\therefore z=-0.26$

Now we have to find the left tailed critical value at 0.01 significance level using the standard normal table.

The critical value is:

$z_{critical}=-2.33$

Since the test statistic is -0.26 lies in acceptance region because the critical region is beyond -2.33, therefore, we fail to reject the null hypothesis.

5 0

3 years ago