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 :)