Pleas i don't get this at all (pic included)

John can eat 10 cookies in 1/2 hr how many cookies can he eat in 45 minutes make a proportion and solve

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?

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m