Problema Solution
Tina invested $400, at 9% interest per year. At the end of the year, how much money did she have altogether?
Answer provided by our tutors
P = $400
r = 0.09 or 9%
t = 1 year
I = interest
I = P*r*t
I = 400*0.09*1
I = $36
P + I = 400 + 36 = $436
Tine had $436 at the end of the year.