How do you do this question?

35,250

Step-by-step explanation:

We divide the interval into 4:

0 ≤ x ≤ 1

1 ≤ x ≤ 2

2 ≤ x ≤ 3

3 ≤ x ≤ 4

The height of each rectangle is evaluated at the midpoint of the interval.  So the first rectangle has a height of f(½) = 1500.

The Riemann sum is therefore:

A = (1−0) (1500) + (2−1) (1750) + (3−2) (750) + (43−0) (-750)

A = 3250 liters

The volume increases by 3250 liters, so the final volume is 35,250 liters.

if the probability is 1/12, 75 people will receive a $25 gift card

step-by-step explanation:

dont know

step-by-step explanation: