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ZanzabumX [31]
4 years ago
13

An elevator in a hotel moves at 20 feet per second. leaving from the ground floor, its height in feet after t seconds is given b

y the formula h(t)=20t. A bolt comes loose in the elevator shaft above, and its height in feet after falling for t seconds is given by h(t)=-16t^2+200. At what time and at what height does the bolt hit the elevator?
Mathematics
1 answer:
Lisa [10]4 years ago
8 0

Answer:

After 7.5 seconds and a height of 0

Step-by-step explanation:

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Which glide reflection describes the mapping triangle ABC triangleDEF?
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3 years ago
Which formula can be used to describe the sequence? –81, 108, –144, 192, ...
ale4655 [162]

Answer:

a(n) = -81(-4/3)^(n - 1)

Step-by-step explanation:

The first term is -81.  From -81 we obtain the next term, 108, by multiplying -81 by -4/3.  Note how (-4/3)(108) = -144 as anticipated.

Thus, the common ratio is -4/3.

The explicit function for this geometric series is

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8 0
3 years ago
The total price of a shirt and a cap is $11. If the price of the shirt was doubled and the price of the cap was three times its
Oliga [24]

Answer:

shirt= $8

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Step-by-step explanation:

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then plug into the other equation

2x+3(11-x)=25

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2x+33-3x=25

-x+33=25

subtract 33 from both sides

-x=-8

divide by -1

x=8

the put that answer into original equation

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subtract 8 from both sides

y=3

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Step-by-step explanation:

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