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Lesechka [4]
3 years ago
7

You opened your first savings account 3 months ago. So far, you have earned $9.90 in simple interest, at an annual interest rate

of 6%. How much money did you put in the account when you opened it? Use the formula: I = Prt.
Mathematics
1 answer:
LekaFEV [45]3 years ago
6 0
I=prt
9.90=p (.06)(3)
9.90=p(.18)
9.90/.18=p.18/.18
55=p

I put in $55 into the account when I opened it.
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20% of 32= 6.4



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684

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3 0
3 years ago
I don't know how to do this but I know you have to find the growth or decay
xenn [34]

Answer:

\boxed{y=5(1.05)^t\to\:5\% \:rate \:of \:growth}

\boxed{f(t)=50(.95)^t\to\:5\% \:rate \:of \:decay}

\boxed{g(t)=50(1.5)^t\to\:50\% \:rate \:of \:growth}

\boxed{y=5(.5)^t\to\:50\% \:rate \:of \:decay}

Step-by-step explanation:

We can rewrite the given functions in the form f(x)=a(100\%+r\%)^x to determine the rate of growth or f(x)=a(100\%-r\%)^x to determine the rate of decay

y=5(1.05)^t=5(100\%+5\%)^t\to\:5\% \:rate \:of \:growth

f(t)=50(.95)^t=50(100\%-5\%)^t\to\:5\% \:rate \:of \:decay

g(t)=50(1.5)^t=50(100\%+50\%)^t\to\:50\% \:rate \:of \:growth

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4 0
3 years ago
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Nadusha1986 [10]

Answer:

The answer is 11

4 0
3 years ago
Read 2 more answers
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