( I'll give you 30 points )

The life spans of a computer manufacturer’s hard drives are normally distributed, with a mean of 3.5 years and a standard deviation of 0.75 years. What is the probability of a randomly selected hard drive from the company lasting between 2.25 years and 3.25 years? Use the portion of the standard normal table below to help answer the question.

(x-5)1/2+5=2 what is a possible solution?

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Meg constructed triangle poq and then used a compass and straightedge to accurately construct line segment os, as shown in the figure below, which could be the measures of angles pos and angle poq?