The table shows the rates charged for the use of utility in a country.
- Bobby and his family used 15 units of utility in April. How much did they pay for the usage of utility in April?
- Xylia and her family paid $160.70 for the usage of utility in May. How many units of utility did they use in May?
(a)
Amount that Bobby and his family paid for the usage of utility
= 15 x 0.93
= $13.95
(b)
Amount that Xylia and her family paid for first 30 units of utility
= 30 x 0.93
= $27.90
Amount that Xylia and her family paid for next 30 units of utility
= 30 x 1.16
= $34.80
Amount that Xylia and her family paid for the remaining units of utility
= 160.70 - 27.90 - 34.80
= $98.00
Remaining units of utility that Xylia and her family used
= 98.00 ÷ 1.96
= 50
Total number of units of utility that Xylia and her family used
= 30 + 30 + 50
= 110
Answer(s): (a) $13.95; (b) 110
