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Nookie1986 [14]
3 years ago
7

A department store buys 100 shirts at a cost of $800 and sells them at a selling price of $10 each. Find t

Mathematics
1 answer:
Pachacha [2.7K]3 years ago
8 0

Answer:

125%

Step-by-step explanation:

they sold the shirtsto the store at 8 $. they now sell for 10, so 10/8 is 125%

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BRAINLIEST GURANTEED
Amiraneli [1.4K]

Given:

The function is

h=3+25t-5t^2

To find:

The values of t where h is 8 meters.

Solution:

We have,

h=3+25t-5t^2

Putting h=8, we get

8=3+25t-5t^2

0=3+25t-5t^2-8

0=-5+25t-5t^2

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Dividing both sides by -5 and interchanging the sides, we get

1-5t+t^2=0

t^2-5t+1=0

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Using quadratic formula, we get

t=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}

t=\dfrac{-(-5)\pm \sqrt{(-5)^2-4(1)(1)}}{2(1)}

t=\dfrac{5\pm \sqrt{25-4}}{2}

t=\dfrac{5\pm \sqrt{21}}{2}

It can be written as

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