Mr. Williams trains a group of student athletes. He wants to know how they are improving in the number of push-ups they can do. These dot plots show the number of push-ups each student was able to do last month and this month.

How much did the mean number of push-ups increase from last month to this month?

Question 1 options:

2.75 more push-ups

4.375 more push-ups

7.5 more push-ups

There is not enough information given to answer the question.

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

Simplify this expression. 8x 16(x + y)