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OLEGan [10]
3 years ago
6

The function y= -16t^2 +24t represents the height y (in feet) of a tennis ball bouncing straight up from the ground t seconds af

ter it bounces. After how many seconds does the tens ball return to the ground?
Mathematics
1 answer:
taurus [48]3 years ago
5 0
We want to know the time, <em>t</em>, it takes the ball to reach a height (<em>y</em>) of 0.
0=-16t^2+24t
We can factor out the GCF first.  The largest number that will divide evenly into 16 and 24 is 8.  Also, both terms have a <em>t</em>, so we can factor that out as well:
0=8t(-2t+3) (-16/8 = -2 and 24/8 = 3)
Using the zero product property, we know that either 8t=0 or -2t+3=0.  Solving the first equation, we would divide both sides by 8:
8t/8=0/8
t=0
This is at 0 seconds, before the ball is in the air at all.
Solving the second equation, we start by subtracting 3 from both sides:
-2t+3-3=0-3
-2t=-3
Now we divide both sides by -2
-2t/-2=-3/-2
t=1.5
After 1.5 seconds, the ball will hit the ground again.
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2 years ago
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Marta_Voda [28]

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3 years ago
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This will also be the longest side of the 30-60-90 triangle.  Its sides can be listed as t, 2t and t√3.  Since the hypotenuse is the longest side, we have:

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3 years ago
A small fair charges an admission fee for children and adults. The cost for admission is $3 per adult and $2 per child. On a cer
Whitepunk [10]
2c+3d=900
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3 years ago
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zhuklara [117]
24 divided by 56 will give you the answer.

= 0.42

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8 0
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