Question

The function h=−16t^2+1936 gives an object’s height h, in feet, at t seconds. When will the object be 912 feet above the ground?

Answer 1

you can put y1 = -16t^2+1936 into a graphing calculator and have y2 = 912

next you can click 2nd trace then 5

which means the two will intersect at 8
(y=912 x=8)

meaning the object will be 912 feet above the ground at 8 seconds