Vinny auto repair charges $75 an hour for labor plus the cost of parts. mr sellners car was repaired and repaired $50 worth of parts and h hours of labor. the total cost, c, to repair the car is modeled by this function. c(h)=75h+50 the total cost to repair the car was $650. how many hours of labor were required? select the correct answer below. a.8hours b.8 2/3 hours c.9 1/3hours d.13 hours

For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)