Chapter 8.2A, Problem 4A

In the following descriptions, write an expression in terms of the given variable that represents the indicated quantity.

a. The cost of having a plumber spend h hours at your house if the plumber charges $50 for coming to the house and $60 per hour for labor

b. The amount of money in cents in a jar containing d dimes and some nickels and quarters if there are 3 times as many nickels as dines and 3 times as many quarters as nickels

c. The sum of three consecutive integer if the least integer is x

d. The number of bacteria after n min if the initial amount of bacteria is q and the number of bacteria doubles every minute (Hint: The answer should contain q as well as n.)

e. The temperature after t hr if the initial temperature is $40°\text{F}$ and each hour it drops by $3°\text{F}$

f. Pawel’s total earning after 3 yr if the first year his salary was s dollars, the second year it was $5000.00 higher, and the third year it was twice as much as a the second year

g. The sum of three consecutive odd natural numbers if the least is x

h. The sum of three consecutive natural number if the middle is m