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Tamiku [17]
3 years ago
11

Samantha threw an apple out of a window from the tenth floor of her apartment building.The equation y=-16t^2+120 can be used to

represent the fruits height above the ground, where t represents time, in seconds, after she threw the Apple. How long did it take the Apple to hit the ground?
Mathematics
2 answers:
Savatey [412]3 years ago
5 0
If the apple is on the ground, then the height y is 0. To find t, just plug in 0 for y:
0=-16t^{2}+120
-120=-16t^{2}
t^{2} =7.5
t=2.74

So the answer is 2.74 seconds.

Note that taking the square root of 7.5, mathematically, gives you both 2.74 and -2.74. But because we know that time did not go backwards, only the positive value for t was considered.
ss7ja [257]3 years ago
3 0
The awnser your looking for is 2. something seconds 
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Step-by-step explanation:

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A falling object accerlates from -10.0m/s to -30.0m/s how much time does that take
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Answer:

2.04 seconds

Step-by-step explanation:

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3 years ago
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5 0
3 years ago
Which graph represents the function of f(x) = the quantity of 9 x squared minus 36, all over 3 x plus 6?
love history [14]
F ( x ) = ( 3 x + 6 ) ( 3 x - 6 ) / ( 3 x + 6 ) = 3 x - 6
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6 0
3 years ago
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neonofarm [45]

Answer:

<u>30 people </u>

Step-by-step explanation:

The question is as following:

Here are the ingredients for pineapple sherbet for 6 people

800g pineapple 4 egg whites 1/2 lemon 100g caster sugar

Dan makes pineapple sherbet he uses 2 1/2 lemons

work out how many people he makes pineapple sherbet for?

=======================================================

1/2 lemon needed for pineapple sherbet for 6 people

2 1/2 lemons needed for pineapple sherbet for <u>x</u> people

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∴ x = ( 6 * 2 1/2 ) ÷ (1/2)

x = 6 * 5/2 * 2 = 30 people

<u>So, he make the pineapple sherbet for 30 people </u>

5 0
3 years ago
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