How would i show my work on an online exam?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

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).

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.