Respuesta :

Answer:

The annual interest rate is $70

Step-by-step explanation:

If you divide 210 by 3 yrs you get 70 so they are making $70 a year off that investment.

Answer:  STEP 1: Find an interest by using the formula , where I is interest, P is total principal, i is rate of interest per year, and t is total time in years.

In this examplee P = $3500, i = 210% and t = 3 years, so

i=P*i*t

i=3500*2.1*3

i=22050

STEP 2: Find an amount by using the formula .

A=p+i

A=3500+22050

A=25550

Step-by-step explanation: hope that helps :)

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