Number 19 a-d. idk how to set it up and idk how to solve please help

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?

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2 acellus answer