The following table shows the probability distribution for a discrete random
variable.
| X
P(X
12
0.07
15
0.21
17
0.17
20
0.25
22
0.05
24 | 25 | 30
0.04 0.13 0.08
an
The mean of the discrete random variable X is 19.59. What is the variarice
of X? Round your answer to the nearest hundredth.

100 points, hi, i’m not sure how to get the equation from the graph and table.

The cone in the diagram has the same height and base area as the prism. what is the ratio of the volume of the cone to the volume of the prism? h hl base area-b base area =b volume of cone_1 volume of prism 2 volume of cone 1 volume of prism 3 volume of cone 2 volume of prism 3 oc. od. volume of cone volume of prism e. volume of cone volume of prism 3 2

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?