The table shows the rates charged for the use of utility in a country.
- Flynn and his family used 35 units of utility in May. How much did they pay for the usage of utility in May?
- Natalie and her family paid $183.40 for the usage of utility in June. How many units of utility did they use in June?
(a)
Amount that Flynn and his family paid for the usage of utility
= 35 x 0.78
= $27.30
(b)
Amount that Natalie and her family paid for first 40 units of utility
= 40 x 0.78
= $31.20
Amount that Natalie and her family paid for next 40 units of utility
= 40 x 1.23
= $49.20
Amount that Natalie and her family paid for the remaining units of utility
= 183.40 - 31.20 - 49.20
= $103.00
Remaining units of utility that Natalie and her family used
= 103.00 ÷ 2.06
= 50
Total number of units of utility that Natalie and her family used
= 40 + 40 + 50
= 130
Answer(s): (a) $27.30; (b) 130
