Question

when draining her hot tub, the height of the water in Brittany's hot tub decreases at a rate of 2 inches per minute. After 9 minutes there are 11 inches of water in the tub. Assume that the height is decreasing at a constant rate. After how many minutes will the tub be empty.

Answer 1

$h-11=-2(t-9)$

$h=-2t+18+11$

$h=-2t+29$