Work out the mean for the data set below:
7.7, 1.6, 5.3, 4.9, 2.1

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?

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