Solve the problem.An electrician charges a fee of $60 plus $45 per hour. Let C(x) be the function representing the cost in dollars of using the electrician for x hours. (a) Find C(x). (b) Suppose the electrician decides to give the first hour free, then charges the same flat fee and per hour rate after one hour. Write the resulting cost function D in terms of C.
A. (a) C(x) = 45x - 60
(b) D(x) = C(x) - 1, if x > 1
B. (a) C(x) = 45x + 60
(b) D(x) = C(x - 1), if x > 1
C. (a) C(x) = 45x - 60
(b) D(x) = C(x - 1), if x > 1
D. (a) C(x) = 45x + 60
(b) D(x) = C(x) - 1, if x > 1
Answer: B
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?
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?
__________
?
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?
__________
?
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__________
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at 
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