Answer:
25
Step-by-step explanation:
Is that even an actual equation?
15 + 10 + 16 = 41
for the unshaded area
subtract the area of the whole rectangle shaded.
whole rectangle is
16(8) = area of 128
unshaded = 128 - 41 = 87
so your answers are
41, and 87
The amount of gas in the tank would be 93.5%, which is .935 in decimal form. Multiply that by 40 and the answer is 37.4 gallons.

Remember, diameter = 2 x radius