The average commute times in minutes for 15 different employees at a company were used to make the stem and leaf plot. 0 | 9

1 | 2, 3

2 | 6, 9

3 | 1, 3, 4, 5

4 | 2, 4, 7

5 | 6

6 | 1, 6

Key: 6|1 = 61

What is the range of the commute times shown in the stem and leaf plot?

A.

47 minutes

B.

57 minutes

C.

66 minutes

D.

54 minutes

Consider the table below. x y -1 -5 0 5 1 11 2 13 3 11 complete the standard form equation representing the quadratic relationship displayed above, where a, b, and c are constants.

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.