I’m stumped on the second portion of this question. I have already solved A:

The scores of a sociology test are normally distributed, has a mean of 72.8 points and a standard deviation of 10.5 points.

A) what score is at the 65th percentile? Round to whole numbers (answer is 77 points)

B) above what score is the top 18% of the class? Round to whole numbers.

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