Question

If a football player passes a football from 4 feet off the ground with an initial velocity of 36 feet per second, how long will it take the football to hit the ground? Use the equation h = –16t^2 + 36t + 4.

Answer 1

Answer: C. quantity of 9 plus or minus square root of 97 all over 8

If a football player passes a football from 4 feet off the ground with an initial velocity of 36 feet per second, how long will it take the football to hit the ground? Use the equation h = –16t^2 + 36t + 4.

A. quantity of 9 plus or minus square root of 65 all over 8

B. 9 plus or minus square root of 65 end root over 8

C. quantity of 9 plus or minus square root of 97 all over 8

D. 9 plus or minus square root of 97 end root over 8

Step-by-step explanation:

I just did the assignment and C. quantity of 9 plus or minus square root of 97 all over 8 is the correct answer! Hope this helps.

Good Luck!!

Answer 2

Putting equation
0 = -16t² + 36t + 4 
0 = -8t² + 18t + 2 ← Complete the square to solve 
-8(t² - 9t/2) = -2 
8(t² - 9t/4 + 81/64) = 2 + 81/8 
8(t - 9/8)² = 97/8 
(t - 9/8)² = 97/64 
t - (t = 0) 
 (h = 0) at: 
t = (9 + √97)/8 ≅ 2.356 seconds
hope it helps