Question

A batter hits a baseball upward with an initial speed of 112 feet per second. After how many seconds does the ball hit the ground? Use the formula h = rt - 16t^2 , where h represents height in feet and r represents the rate in feet per secound

Answer 1

when the ball hits the ground h = 0
0 = 112 t - 16t^2
t(112 - 16t) = 0
16t = 112
t = 7 seconds

Answer 2

I don't understand

Answer 3

which part don't you understand?

Answer 4

The whole thing

Answer 5

h = 0 because the ball is on the ground
112 is the value for r - the initial speed of the ball
so these are plugged into the given formula
t represents the time which we need to find
so we rearrange the formula to make t the subject

t(112 - 16t) = 0
either t = 0
or 112-16t = 0 which gives t = 7 seconds

the t = 0 comes from when batter first hits the ball
7 seconds is the time that the ball is in the air until it hits the ground again

Answer 6

Oh I get it now do u know what a box mean

Answer 7

box?

Answer 8

best answer box?

Answer 9

No its a set with a box in it