Which expression is equivalent to the following

The quadratic function h(t) = -16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after its dropped from a 15 story building. from what height in feet was the ball dropped?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.