Choose the one alternative that best completes the statement or answers the question.
-To remodel a bathroom, a contractor charges

\$ 25

per hour plus material costs, which amount to

\$ 3,775

. Therefore, the total cost to remodel the bathroom is given by

f ( x ) = 25 x + 3,775

where

x

is the number of hours the contractor works. Find a formula for

\mathrm { f } ^ { - 1 } ( \mathrm { x } )

. What does

\mathrm { f } ^ { - 1 } ( \mathrm { x } )

compute?
A)

\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { 25 } - 151

; This computes the total cost if the contractor works

x

hours.
B)

f ^ { - 1 } ( x ) = \frac { x } { 25 } - 151

; This computes the number of hours worked if the total cost is

x

dollars.
C)

\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { 25 } - 3,775

; This computes the total cost if the contractor works

x

hours.
D)

\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { 25 } - 3,775

; This computes the number of hours worked if the total cost is

x

dollars.

Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice