Question

if an object is dropped from a height of 85 feet the function h(t)=-16t^2+85 gives the height of the object after t seconds. approximately when will the object hit the ground?
85.00
69.00
0.33
2.30

Answer 1

you solve h=0

Answer 2

0 = -16t^2 + 85

Answer 3

16t^2 = 85

t^2 = 85/16

t = + - sqrt( 85/16)

Answer 4

so A?

Answer 5

no C!?

Answer 6

right?

Answer 7

you dont own a calculator?

Answer 8

on my phone...

Answer 9

i got confused with the 85, but i honestly think its c

Answer 10

C would be wrong

Answer 11

read carefully what i wrote

Answer 12

no idea......

Answer 13

well im not supposed to give the answer. maybe someone else can help

Answer 14

k

Answer 15

sqrt( ) means take the square root

Answer 16

yeah, i know that part its when ^2