Make sure to answer Parts A, B, and C using the table.
The information on the table is for two pay-as-you-go cell phone companies.
Cell City
Smart Mobile
2.5 hours for $8
1/2 hour for $1.75
Part A
What is the unit cost, in dollars, for each company?
(Enter values only; do not enter units)
r
SELECTOR TOOL
Select the relevant button to use a function.
(b)
Part B
Show/explain the steps for calculating the unit costs.
Be sure to show work for both Cell City and Smart Mobile.
It is okay to use a calculator to check your work (but still explain the calculations you did).
CELL CITY SMART MOBILE
(c)
Part C
Based on their unit rates, which company offers the best deal?
A
Smart Mobile, because the unit cost is higher.
B
Cell City, because the unit cost is higher.
C
Cell City, because the unit cost is lower.
D
Smart Mobile, because the unit cost is lower.
Part A:
Cell City: $3.20 per hour
Smart Mobile: $3.50 per hour
Part B:
To calculate the unit cost for Cell City, divide the total cost ($8) by the total hours (2.5):
Unit Cost for Cell City = $8 / 2.5 hours = $3.20 per hour
To calculate the unit cost for Smart Mobile, divide the total cost ($1.75) by the total hours (0.5):
Unit Cost for Smart Mobile = $1.75 / 0.5 hours = $3.50 per hour
Part C:
Based on their unit rates, Cell City offers the best deal because its unit cost is lower than Smart Mobile's. Thus, the correct answer is C.