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3 years ago

If the simple interest on $4000 for 9 years is $1800, then what is the interest rate.

Mathematics

2 answers:

pychu [463]3 years ago

8 0

Answer:

Step-by-step explanation:

4000 × 9 × r = 1800

r = 1800/36000

r = 0.05 × 100

marysya [2.9K]3 years ago

5 0

Answer:

9% or 0.09

Step-by-step explanation:

so 1800/4000 is .45 then we do .45/5 which is 0.09 and if u wanna double check do 4000 x 0.09 then that gives us 360 then we do 360 x 5 for 5 years that you've been investing which leaves us with 1800 which is the interest you got.

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