How do I solve the following equation? A certain car model has a mean gas mileage of 34 miles per gallon (mpg) with a standard deviation 3 mpg. a pizza delivery company buys 59 of these cars. what is the probability that the average mileage of the fleet is greater than 33.8 mpg?

Can somebody me out with this question

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

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)