Answer:
the answer is $40.5
Step-by-step explanation:
the basic formula of finding our interest is I = PxRxT
P (principal) = 675
R (rate) = 10% (we have to turn it into a decimal which is 0.010)
T (time) = 6 years
so :
I = 675 x 0.010 x 6
I = 40.5
She has 4 groups all together. 3 groups with ten rocks each and 1 group with 8 rocks(8/10).
