The height h, in feet, of objects such as thrown balls can be modeled as a function of time
t, in seconds, as h(t) = -16t? + v0t + h0, where the initial upward velocity is v0, in feet
per second, and the initial height is h0, in feet.
marla and kerry are practicing lacrosse tosses. marla throws a ball from a height of 6
feet with an initial vertical velocity of 40 feet per second. at the same instant, kerry
throws a ball from a height of 5 feet with an initial vertical velocity of 50 feet per second.
which ball is in the air longer and by how many seconds more?
a. marla's, by about 0.49 seconds
b. kerry's, by about 0.49 seconds
c. marla's, by about 0.6 seconds
d. kerry's, by about 0.6 seconds