An 18-ft ladder is leaning against a building. The base of the ladder is 7 ft from the building. To the nearest tenth of a foot, how high up the building does the ladder reach?

What is the answer to this problem 7 * 5/6

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Answer this question, only if you know the answer. 30 points and brainliest!