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38 votes
H=7+44t-16^2

Find all values of t for which the ball’s height is 27 feet

PLEASE HELP ME :(

H=7+44t-16^2 Find all values of t for which the ball’s height is 27 feet PLEASE HELP-example-1
User Eerriicc
by
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1 Answer

20 votes
20 votes

Answer:

When t=2.1753 & t=.5746 , h=27

Don't worry, I got you. Also, my calculator does too.

We set h equal to 27, because we want the height to be 27 when we solve for t.

That leaves us with:

27 = 7 + 44t - 16t^2

Simplify like terms,

20 = 44t - 16t^2

Move 20 onto the right side, so we can use quadratic equation

44t - 16t^2 - 20 = 0 --> -16t^2 + 44t - 20

Using quadratic, you get

t=2.1753 & t=.5746

poster confirmed : "It’s t=2.18 and t=0.57"