Question 1189911: (b) In 2017, ELEC-TT had the following rate schedule for electricity usage for residential purposes;
Monthly service charge $100.00
Per KWh charge:
1st 1000 KWh: $1.75/KWh
Over 1000 KWh: $3.52 /KWh
(i)What is the charge for using 998 KWh in a month? [2]
(ii)What is the charge for using 2500 KWh in a month? [3]
(iii) If C is the monthly charge for x KWh, develop a model relating the monthly charge and kilowatt-
hours used. That is, express C as a function of x.
[4]
Answer by mananth(16946)   (Show Source):
You can put this solution on YOUR website!
(i)What is the charge for using 998 KWh in a month?
C = 100 +1.75*998
(ii)What is the charge for using 2500 KWh in a month?
C= 100 +1000*1.75+(2500-1000) *3.52
(iii) If C is the monthly charge for x KWh, develop a model relating the monthly charge and kilowatt-
hours used. That is, express C as a function of x.
C= 100 + 1000*1.75 +3.52(x-1000)
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