Which equation is the inverse of. y = 100 – x2?

explain

How do you solve a question like this?

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is

A50-foot ladder is leaning against a vertical wall. if the base of the ladder is 45 feet from the base of the wall, find the angle the bottling of the ladder makes with the ground.