The table shows the rates charged for the use of utility in a country.
- Glen and his family used 35 units of utility in February. How much did they pay for the usage of utility in February?
- Kimberly and her family paid $204.70 for the usage of utility in March. How many units of utility did they use in March?
(a)
Amount that Glen and his family paid for the usage of utility
= 35 x 0.87
= $30.45
(b)
Amount that Kimberly and her family paid for first 40 units of utility
= 40 x 0.87
= $34.80
Amount that Kimberly and her family paid for next 40 units of utility
= 40 x 1.36
= $54.40
Amount that Kimberly and her family paid for the remaining units of utility
= 204.70 - 34.80 - 54.40
= $115.50
Remaining units of utility that Kimberly and her family used
= 115.50 ÷ 2.31
= 50
Total number of units of utility that Kimberly and her family used
= 40 + 40 + 50
= 130
Answer(s): (a) $30.45; (b) 130
