Monica made 350 cookies for the bake sale. she sold them for $0.65 each. she sold 4/5 of the cookies. how much money did monica collect? a. $172.00. explanation: explanation: she sold 4/5 of the cookies, so she sold 280 cookies. if she charged 50¢ per cookie, she would have collected $140.00. because she sold the cookies for 65¢ each, she collected more than $140.00. b. $182.00. explanation: if she sold all of the cookies, she would have collected $227.50. because she only sold 4/5 of the cookies, she collected less than $227.50. c. $207.50. explanation: if she sold all of the cookies, she would have made $227.50. but she didn't sell 4/5 of the cookies. if is subtracted from $227.50, the answer is about $207.00.

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)