Write the equation of a parabola with its vertex at the origin and directrix at y = 1
a. x^2=y
b. y^2=x
c. x^2=-4y
d. y^2=-4x

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?

Enter the amplitude of the function. f(x)=3cosx

The olympic-size pool at the recreational center is a right rectangular prism 50m long and 25m wide. the pool contains 3000m of water. how deep is the water in the pool?