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algol [13]
2 years ago
7

42. Nathan bought a new computer for $875. He

Mathematics
2 answers:
Aleksandr-060686 [28]2 years ago
5 0

Answer:

5%

Step-by-step explanation:

The equation for simple interest rate is as follows:

A = P(1+rt)

A = final amount

P = initial principal amount

r = annual interest rate

t = time (in years)

So, we need to plug everything in and solve for r:

The final amount is equal to $875 plus the interest of $131.50.

A = 875 + 131.50 = 1006.50

Now, plug everything in:

1006.50 = 875( 1 + r(3))

Solve:

1 + 3r = 1.15028571                            Divide 1006.50 by 875

3r = 0.15028571                                Subtract 1 from 1.15028571

r = 0.050                                           Divide by 3

The simple interest rate would be 5%. I converted the r to a percent by multiplying 0.050 by 100.

I hope this helps!! Ask questions if you need!!

siniylev [52]2 years ago
3 0

Answer:

15% to be simple

Step-by-step explanation:

since % Increase = Increase / Original Number × 100

so 131.5 / 875 = 0.00150285714

0.00150285714 * 100 = 0.15028571428

round.

simple: 15%

more exact: 15.028571428%

hope this helps:)

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