Help I can only answer twice I already did once

Which is the product of 58 and 1,000? a. 0.058 b. 5,800 c. 58,000 d. 580,000

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

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?