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pshichka [43]
2 years ago
12

The height of a projectile launched upward at a speed of 48 feet/second from a height of 160 feet is given by the function h(t)=

-16sup(t,2)+48t+160. How long will it take the projectile to hit the ground?
Mathematics
1 answer:
Grace [21]2 years ago
5 0

Answer:

Hello,

5 s

Step-by-step explanation:

h(t)=-16t^2+48t+160\\=-16(t^2-3t-10)\\=-16(t^2-5t+2t-10)\\=-16(t(t-5)+2(t-5))\\=-16(t-5)(t+2)\\\\h(t)=0 \Longleftrightarrow\ t=-2\ or\ t=5\\\\Only\ t=5\ is \ a\ answer.(time\ must\ be\ positive)

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For every 9 black and white copies printed there are 2 color copies printed. If there are 200 color copies printed how many blac
alexandr402 [8]

Answer:

<u>900</u> black and white copies are printed.

Step-by-step explanation:

Given:

For every 9 black and white copies printed there are 2 color copies printed.

If there are 200 color copies printed.

Now, to find the number of black and white copies are printed.

Let the number of black and white copies printed be x.

As given, for every 9 black and white copies printed there are 2 color copies printed.

So, 9 is equivalent to 2.

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Thus, x is equivalent to 200.

Now, to solve by using cross multiplication method:

\frac{9}{2} =\frac{x}{200}

<em>By cross multiplying we get:</em>

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<em>Dividing both sides by 2 we get:</em>

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8 0
3 years ago
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Step-by-step explanation:

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Answer:

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2 years ago
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