Question

The rule below shows how Mrs. Murphy's long-distance phone company computes her monthly bill. Which answer expresses that rule in the form of an equation?

Multiply the number of minutes Mrs. Murphy spent on long-distance calls by $0.42, the long-distance rate. Then add $24, the flat monthly charge.

A.f(t)=4T×(0.42+24)
B.f(t)=$0.42=+t×24
C.f(t)=$(0.42×t+24)
D.f(t)=$0.42×(t+24)

Answer 1

Multiply the number of minutes Mrs. Murphy spent on long-distance calls by $0.42, the long-distance rate. Then add $24, the flat monthly charge.

C.f(t)=$(0.42×t+24)