The mean absolute deviation (mad) for the first set of data is 1.2 and the mad for the second set of data is 0.4. approximately how many times the variability in the heights of the seventh graders is the variability in the heights of the sixth graders? (round all values to the tenths place.)
3.2
3.0
1.5
0.8

Thomas hiked 6 miles on monday 10 miles on tuesday and 8 miles on wednesday. what is the mean value closesst to the mean number of miles over the tree day period?

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The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6