2 years ago

Help me on this questions please.

Mathematics

1 answer:

Pepsi [2]2 years ago

4 0

Answer:

The formula for exponential growth is f(x)=a(1+r)^x, where a is the initial amount/number, r is the growth rate, and x is the number of years/month/etc. The problem tells us that the initial area is 4500. Every year, it decreases by 7.25%, which is technically -0.0725. "t" is the time. Therefore, we plug in those values into the formula. Then, we have:

f(x) = 4500(1-0.0725)^t

f(x) = 4500(0.9275)^t.

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-8x^2+4x+5=0 using quadratic formula

daser333 [38]

So you want to solve for x?

It would be nice if this would easily factor:
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So you need to use the quadratic formula:
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x = (-4 +/- $\sqrt{16-4(-8)(5)}$ )/2(-8)
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Can someone help me with this?

abruzzese [7]

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