Mathematics, 20.02.2020 08:02 umarhaley
A municipal electrical utility charges customers a $15 per month fee plus 12 cents per kilowatt- hour of energy used.
Write an equation for a customer's monthly costs, C (in dollars) for electric service as a function of r, the kilowatt-hours used.
a. C(x) 12 + 0.15x
b. C(z) = 15e0.12z
c. C(x) = 15 + 12z
d. C(z) = 15 + 0.12c
e. C(z)= 15(1.12)"
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