Ineed answers quickly i meant mathematics also sorry

The average mean is: B. 16.5

You can find the mean by adding up the numbers, in this case:

17.2+18.3+14.9+16.8+15.3=82.5

then divide it by the number of data points, which would be: (17.2+18.3+14.9+16.8+15.3)/15=16.5

Hope it helps!

the united states has a federal government. the president is the head of the federal government of the united states. however, each state forms its government for administration purposes. the powers of the state governments are exercised within restricted state boundaries. and citizens participate in this government by voting.

the density would be a smaller number.