Question

The Kendal Company manufactures automobile engine parts. Running the manufacturing operations requires 12 watts (units of electricity per hour). The amount of electricity required to run the manufacturing operations and lighting the facility is given by y = 12x + 24, where x is the number of hours of manufacturing and y is the amount of electricity expended. How much electricity is used on a day when no parts are manufactured? (x 0, y 0)

A. 2 watts
B. 12 watts
C. 20 watts
D. 24 watts
E. 30 watts

Answer 1

When no parts are manufactured, there will be no hours of operation so x = 0. Putting this into the equation of electricity used:
y = 12(0) + 24
y = 24
The answer is D.
The significance of this is that even when no manufacturing is taking place, the lights, fans, etc are still running and these require 24 watts of energy.