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4 years ago

What is 20 percent of 3500

Mathematics

1 answer:

Aleonysh [2.5K]4 years ago

4 0

20% = 20/100 = 1/5
1/5 of 3500
1/5 X 3500/1 = 3500/5
3500/5 = 700.

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Answer: 3 seconds

Step-by-step explanation:

Hi, the correct equation is d (t) = 144- 16 t²

So, to answer this question we have to analyze the information given:

When the car reaches the ground the distance, d (t) of the car from the ground is 0.

0 = 144- 16 t²

Solving for t:

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t²=144/16

t²= 9

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t = 3 seconds

Feel free to ask for more if needed or if you did not understand something.

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3 years ago

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3 years ago

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$\displaystyle\int_{u=0}^{u=\pi}\frac{\sin u}u\,\mathrm du$

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By the same substitution as before, we can write this as

$\displaystyle\pi\int_0^\pi\frac{\sin^2u}u\,\mathrm du$

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Like the previous, this require a special function in order to express it in a closed form. You would find that its value is

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4 years ago