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31-12-2020
Mathematics

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Alberto invests his $90 for 2 years at r % per year simple interest.
At the end of 2 years the amount of money he has is $99.
Calculate the value of r.

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jamyangnorzin jamyangnorzin

31-12-2020

Answer:

rate=55 percent

Step-by-step explanation:

SI=PRT

p=90

r=?

t=2

si=99

R=SI÷PT

R=99÷90×2

r=99÷180=0.55

r=0.55×100

R=55%

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