What does r represent in statistics

On some days, Melvin commutes 3.5 hours per day to the city for business meetings. Last week he commuted for a total of 14 hours. How many days did he commute to the city

500 people were surveyed and asked whether had donated food or money to local charities in the past year. 80 had donated food, 150 had donated money, and 45 had donated both.

Your truck tires are rated at? 45,000 miles. what is the probability that this? tire's tread life will fall between? 44,500 and? 47,500 miles? assume the mean tire life is? 45,000 miles and the standard deviation is? 3,000 miles.

4k to the 2nd power divided by 8k to the 5th power

What property is (3x10) x8x (10x8)

5e+1=3e - (-5) what is the answer and show your work

A skateboard ramp is 17 inches high and rising an angle of 25° how long is the base of the ramp?

Bill buys a bowling ball during the sale. The sale was 75% off If the original price was $28, how much does Bill pay?

Two data sets and their mean absolute deviations are shown. Study the plots of each data set and then answer the questions below. Why does Set A have a higher mean absolute deviation than Set B does? Data Set A has a _, so it has a higher MAD.

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. What is the probability that the applicant who gets the job plays drums or guitar?