You earn $8.50 per hour walking dogs and $5.75 per hour mowing lawns. The amount you earn is given by the expression 8.5x + 5.75y where x is the amount of time (in hours) you walk dogs and y is the amount of time (in hours) you mow lawns. Find the amount you earn if you walks dogs for 6 hours and mow lawns for 10 hours.

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.