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Sergio [31]
3 years ago
10

Rita is saving up 15,000 to put a down payment on a condominium. If he starts with 8,000 saved and saves an additional $850 each

month, which equation represents how far Rita is from her goal of reaching $15,000 saved? Let x stand for months and y stand for dollars.
Mathematics
1 answer:
Yanka [14]3 years ago
3 0
The equation is 15000=850x+8000 because the total is 15000 and the you started with 8000 and you saved 850 each month. I hope that will help you
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Answer:

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Step-by-step explanation:

Assuming the snowball is a perfect sphere, then if A denotes the surface area and D the diameter then:

A=4\pi r^{2} = 4\pi (\frac{D}{2} )^{2} =\pi  D^{2}

Differentiating wrt r we have:

\frac{dA}{dD} =2\pi D

We are told that \frac{dA}{dt}= -6 and we want to find \frac{dD}{dt}

By the chain rule we have:

\frac{dA}{dD}=\frac{dA}{dt}.\frac{dt}{dD}=\frac{\frac{dA}{dt} }{\frac{dD}{dt} }

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When D=10 then

\frac{dD}{dt} =-\frac{6}{10*2\pi } =-\frac{3}{10\pi }

The sign (-) shows that the D is decreasing.

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