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

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.