The number of golf balls ordered by customers of a pro shop has the following probability distribution. find the mean.

x|p(x)
3|0.14
6|0.05
9|0.36
12|0.35
15|0.10

a. 7.86
b. 9
c. 6.99
d. 9.66

The diameter of a bacteria colony that doubles every hour is represented by the graph below. what is the diameter of the bacteria after 8 hours? graph of a curve passing through the points zero comma 1, one comma two, two comma four, and three comma eight