To do it without a calculator:
10% of 67 is 6.7
6.7 x 8 is 53.6 (80%)
1% of 67 is .67
53.6 - .67 is 52.93 (79%)
I believe u can put 5 books on there
B= -42 C= -38
So the difference going up to positive is 4 and the difference going down in negative is -4.
8 times 2 is 16 and 12 times 3 is 36. So 16 plus 36 is 52
Principal , P =$800
Rate , r = 6% = 0.06
Time , t = 3 years
Simple Interest = P*r*t = 800*0.06*3 = $144
Total Interest plus Principal = $800 + $144 = $944
