Suppose you drive a car 392 mi on a tank of gas. the tank holds 14 gallons. the number of miles traveled vaties directly with the number of gallons of gas you use. a. write an equation that relates miles to gallons of gas used. let x = the number of gallons used and y = the number in miles driven. b. last year you drove 11,700 mi. approximately how many gallons of gas did you use?

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)