Here is an example of how to do this.. sense $4 x 6 just continue the graph i have already started
200 divided by 30 equals 6.66 dishes per minute. It would take 37.55 minutes to do 250 dishes.
If 30% were perfect, 70% were not perfect. So we know that 70% of the total number of photographs is 210.
p(70/100)=210 multiply both sides by 100
70p=21000 divide both sides by 70
p=300
So there are 300 photographs in all.
If P=8, Then you would plug in 8 for P.
4(8)-2 = 30
Hope this helps :)
