Help me please!!!
Explain how it makes sense too!!

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

The ratio of wooden bats to metal bats in the baseball coach’s bag is 2 to 1. if there are 20 wooden bats, how many metal bats are in the bag?

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?