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l
Analyzing Student Work
HI
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on the
Sofia graphed the points 1.3,-1,0.25, and 1
number line.
+ + + + + + +
-2 -1 0 1 2
which statements about Sofia's work are true? Select
all that apply.
She graphed the points correctly.
She did not graph the points correctly.
She ordered the numbers correctly.
She did not order the numbers correctly.
Then she used the number line to order the numbers from
least to greatest
-13,0.25, 1, 1.3
She correctly ordered -15 as the least.
She correctly ordered 1.3 as the greatest.

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)