3/5 = 3/y
40 = 3y
Divide both by 3
Answer= 13.3
3minutes 45 seconds = 3 45/60 = 3.75 minutes
28 copies/ 1 minute = x copies/3.75 minutes
using cross products
28 * 3.75 = 1 * x
105 = x
We can print 105 copies in 3 3/4 minutes
85 is a composite number because 17×5=85