Rational equations representing work and rate

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

Given: m zade = 60° and m2cdf = (3x + 15) prove: x = 15

Situation: . find the substance's half-life, in days. round your answer to the nearest tenth. a 11 gram sample of a substance that's used to treat thyroid disorders has a k. value of 0.1247. enter the correct answer n - noekt done no - initial mass (at time t = 0) n - mass at timet k a positive constant that depends on the substance itself and on the units used to measure time t= time, in days