75 student in schoolband 45 students play wwodwing what is the percent

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e. g. 98.76543).

If the scale factor between two circles is 2x/5y what is the ratio of their areas?