Answer:
R = 450%/year
Equation:
r = (1/t)(A/P - 1)
Converting r decimal to R a percentage
R = 4.5 * 100 = 450%/year
The actual number is 151.34 but since its a estimate about 150ish
You need two equations to solve a two-variable equation.
If Joe gave 5 pics to site A. Site A would give him $0.75*5=$3.75
If Joe gave 5 pics to Site B. Site B would give him $0.25*5=$1.25
3.75-1.25=2.50
Site A gave him $2.50 more than Site B.
The waitress gets 45/75 = 3/5 of the tips
so waitress gets 3/5 * 350 = $210
