Answer:

And we can use the cumulative distribution function given by:

And for this case we can write the probability like this:

And then the final answer for this case would be 
Step-by-step explanation:
For this case we define our random variable X "price of gasoline for a city in the USA" and we know the distribution is given by:

And for this case the density function is given by:

And we want to calculate the following probability:

And we can use the cumulative distribution function given by:

And for this case we can write the probability like this:

And then the final answer for this case would be 
Answer:
17
Step-by-step explanation:
8*2=4
4+8+5= 17
Answer:
X/5 - 5 = f(x) for the domain [0,infinity)
Step-by-step explanation:
A. you can convert it to miles by doing the problem 950,400/5280=180
B. probably miles since that is the biggest us unit
C.60 miles per hou