23.7 IS GOING TO BE RIGHT BECAUSE 23.73 ROUNDS TO 23.7
The answer is b, f[c(p)]=0.9265p.
f[c(p)]=f(0.85p)=1.09(0.85p)=0.9265p
Cookie sales: 12 weeks divided by 2 weeks = 6 weeks x $360 = $2,160
Car wash: 12 weeks divided by 3 weeks = 4 weeks x $450 = $1,800
Recycling: 12 weeks divided by 4 weeks = 3 weeks x $600 = $1,800
Yard work: 12 weeks divided by 2/5 weeks = 30 x $80 = $2,400
ANSWER:
a) 1157/100^5
b)6789x100^7
Hope it helps u! :)