A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: Age Number of Customers
<
20
53
20-29 61
30-39 67
40-49 51
50-59 72
≥
60
100

One customer is chosen at random for a prize giveaway. (Round answers to 4 decimal places.)

a. What is the probability that the customer is at least 40 but no older than 59?

b. What is the probability that the customer is either older than 60 or younger than 20?

c. What is the probability that the customer is at least 60?

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.