Question 47401
1.10290=12000(1-r).find the r. r=10290/12000= .91
1-.91= .09 to get a percentage multiply .09 by 100
9% decrease rate

2. 65.32*.15= 9.798 add 9.798 to the original cost.
65.32+9.798= 75.118 round to the nearest tenth $75.12