Problema Solution
Suppose you can stay in the sun for x minutes without burning when you do’t put on any lotion. A certain lotion has an SPF of 15. This translates to an algebraic expression 15x which describes how long you can tan without burning. If you normally can stay in the sun for 30 minutes
without burning, how long can you stay in the sun wearing an SPF of 15? Use the algebraic expression to answer this question
Answer provided by our tutors
x = 30 min
15x = 15*30 = 450 min = 7.5 hr