Maths-
SAT
Easy
Question
A pool initially contains 1,385 cubic feet of water. A pump begins emptying the water at a constant rate of 20 cubic feet per minute. Which of the following functions best approximates the volume v(t), in cubic feet, of water in the pool t minutes after pumping begins, for 0 ≤ t ≤ 69?
- v(t) = 1,385 − 20t
- v(t) = 1,385 − 69t
- v(t) = 1,385 + 20t
- v(t) = 1,385 + 69t
The correct answer is: v(t) = 1,385 − 20t
v= 1385 – 20t
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