Mr. Jones asked his first and second period classes to record the number of phone numbers that they had saved in their cell phone, as
shown on the dot plots below.
First Period
Second Period
22
15 16 17 18 19 20 21 22
Number of Phone Numbers
15 16 17 18 19 20 21
Number of Phone Numbers
What is the difference between the median number of phone numbers between the two periods?

Draw a scaled copy of the circle using a scale factor of 2

Apolynomial has two terms. check all of the factoring methods that should be considered. common factor difference of cubes sum of cubes difference of squares perfect-square trinomial factoring by grouping

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)