Question

At the start of the basketball game, the referee tosses a ball for a jump ball. The equation that models the height of the ball is
h(t) = -16t2 + 24t + 5
During what time interval is the height of the ball above 9 feet? (Round your answer to the nearest tenth of a second.)

Answer 1

is this SAT?

Answer 2

yes.

Answer 3

dy/dt=-32t+24 plug in

Answer 4

-32(9)+24 --> y=-3144

Answer 5

whatever units that's in?

Answer 6

seconds? lol..

Answer 7

looks awfully wrong to me

Answer 8

is there a graph? multiple choice answers?

Answer 9

yes

Answer 10

...show us please lol

Answer 11

a) .6 seconds to 1.8 seconds
b) .4 seconds to 1.9 seconds
c) .5 seconds to 2.1 seconds
d) .2 seconds to 1.3 seconds

Answer 12

i did

Answer 13

\[h(t)>9\]\[-16t^2+24t+5>9\]\[-16t^2+24t-4>0\]\[-4t^2+6t-1>0\]zeros of this are: x=0.2 and x=1.3
answer is d.

Answer 14

Thanks

Answer 15

np :)