Answer:
A.
Step-by-step explanation:
In the attached file
I = prt
420 = 7000 x .02 x t
420 = 140 x t
420/140 = 140 x t /140
t = 3 years
25 cubic centimeters....
Hope this helps! all you had to do it multipley <span />
3.75 divided by 3= 1.25
3.75-1.25= 2.50