Suppose that the raw daily oxygen purities de- livered by an air-products supplier have a stan- dard deviation σ ≈ .1 (percent), and it is plausi- ble to think of daily purities as independent ran- dom variables. approximate the probability that the sample mean x of n = 25 delivered purities falls within .03 (percent) of the raw daily purity mean, μ.

The distributive property allows you to say that 3(x − 1) = 3x −

Apool measures 100 meters by 100 meters a toddler inside the pool and trows a ball 60 centimeters from one edge of the pool. how far is the ball from the opposite edge of the pool

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?