A researcher divides some marbles into two data sets. In Data Set 1, the mean mass of the marbles is 17 g. In Data Set 2, the mean mass of the marbles is 13.2 g. The mean absolute deviation of both data sets is 2. What can you infer about the two sets of marbles?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Which expressions are equivalent to -7+3(-4e-3)? choose all answers that apply: choose all answers that apply: a -4(3e+4)? 4(3e+4) b 12e12e c none of the above

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?