Algebra Help (question in description)

Question

A basketball player's hang time is the time spent in the air when shooting a basket. The formula t= sqaure root of d over 2

models hang time, t, in seconds, in terms of the vertical distance of a player's jump, d, in feet. When a particular player dunked a basketball, his hang time for the shot was approximately 1.21 seconds. What was the vertical distance, d, of his jump, rounded to the nearest tenth?

 

 

Answer 1

1.21 = sqrt(d)/2

2.42 = sqrt(d)

d = 2.42^2 = 5.8564