To make a scarf Jenny uses blue yarn and white yarn the number of yards of Blue yarn she uses is four times the number of yards of white yarn and each scarf write four ratios to show the number of yards of white yarn to blue yarn for each scarf

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

Angela took a general public aptitude test and scored in the 88th percentile for aptitude in accounting. what percentage of the scores were at or below her score?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?