Felipe surveyed students at his school. He found that 78 students own a cell phone and 57 of those students own an MP3 player.
There are 13 students that do not own a cell phone, but own an MP3 player.
Nine students do not own either device.

A two way table for the above information is given below:


Find the value of a, b, c, d and e.

a =

b =

c =

d =

e =

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

Describe a situation that you could represent with the inequality x< 17

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.