1. Describe how you would compute the length of time you could sunbathe using an SPF 20 sunscreen lotion if you can stay int he sun for 15 minutes without burning.
2. Can you find the volume of a cube if you only know the length of a side, s? How?
3. Describe what 
means.
4. Explain the difference between numerical expressions and algebraic expressions.
5. You Decide. Darcy and Tonya are studying for an exam. Darcy says, "The square of a number is always greater than the number." Tonya disagrees. Who is correct? Explain you answer.
Write an algebraic expression for the verbal expressioin.
6. The product of the fourth power of a and the second power of b
Write a verbal expression for the algebraic expression.
7. 3
+ 4
Write the expression as an expression with exponents.
8. 4 * 4 * 4
Evaluate each expression.
9. 
10.Geometry. The area of a circle can be found by
multiplying the number 
times the square
of the radius. If the radius of the circle is r, write an expression
that represents the area of the circle.