we use the interest formula. 4000*1.03^11=1.38423387*4000=5536.93548, or 5536.94.
Multiply (2.6 x 10^-7) by 15 to get
3.9 x 10^-6
If you divide 180 by 12 you will get 15 and if you divide 180 by 15 you will get 12 then subtract both products and i t will give you the answer 3
The sum will be x+y because their ages are variables.
