The line plot shows the ages of participants in two group activities at a science center.
What conclusion can be drawn about the data sets?
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X
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19 20 21
10
11
12
13
14
15
16 17
18
22 23
24
25
Age of participants-group1
The mean age of participants in group 2 is
younger than the mean age of participants
in group 1.
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x
x
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X
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Х
12
x
19
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20 21
10
11
13
14
15
16
17 18
22
23 24
25
Group 1 participants have a greater range
in age than group 2 participants.
Age of participants - group 2
The median age of participants in group 2
is older than the median age of participants
for group 1.
More 14- and 15-year olds are in group 2
than in group 1.

Which statement accurately explains whether a reflection over the y-axis and a 270° counterclockwise rotation would map figure acb onto itself? a coordinate plane with figure acb with point a at 1, 1, c at 3, 4 and b at 5, 1 yes, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) yes, a″c″b′ is located at a″(1, 1), c″(3, 4), and b″(5, 1) no, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) no, a″c″b″ is located at a″(1, 1), c″(3, 4), and b″(5, 1)

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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)