Simplify.

4^3•4^-6

A. 1/4^3
B. 1/4^9
C. 1/4^18
D. 4^3

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !