A teenager who is 5 feet tall throws an object into the air. The quadratic function f(x)=−16x2+64x+5 is where f(x)is the height of the object in feet and x

Question

is the time in seconds.

The function in vertex form is
(1 point)
Responses

f(x)=−16(x−2)2+69

f of x is equal to negative 16 times open paren x minus 2 close paren squared plus 69
f(x)=−16(x−2)2−59
f of x is equal to negative 16 times open paren x minus 2 close paren squared minus 59
f(x)=−16(x−2)2 −11
f(x)=−16(x−2)2 −11
f(x)=−16(x−2)2+5

f of x is equal to negative 16 times open paren x minus 2 close paren squared plus 5

Question 2
(1 point)
The object hits the ground after about
seconds.

Answer 1

Responses

a) 0.11 seconds
b) 0.25 seconds
c) 0.36 seconds
d) 2.11 seconds

The correct answer is:

c) 0.36 seconds