The answer is B. It’s not too difficult
You're looking for a value

such that

Because the distribution is symmetric, the value of

in either case will be the same.
Now, because the distribution is continuous, you have that

The mean for the standard normal distribution is

, and because the distribution is symmetric about its mean, it follows that

.

You can consult a

score table to find the corresponding score for this probability. It turns out to be

.
J.
x represents the minutes and y shows how many gallons over that time.
Answer:
a. 
b. 
c. 
d. 
Step-by-step explanation:
Given

Solving (a): When g(x) = 0
Substitute 0 for g(x)


Solve for 8x

Solve for x

Solving (b): when x = 0
Substitute 0 for x




Solving (c): When g(x) = -5
Substitute -5 for g(x)


Solve for 8x


Solve for x


Solving (d): When x = 3
Substitute 3 for x




15-20 is -5. If you put 15 on a number line and go back twenty spaces you land on -5 hope this helps.