4(3x 5) multiply everything by 4
12x+20
6^3 = 216. When using chance, take the number of outcomes(six for a die) and raise it to the power of the number of repetitions
7+7+7=21 is the same as saying 7 times 3+
=21
Looks like you have most of the details already, but you're missing one crucial piece.
is parameterized by

for
and
, and a normal vector to this surface is

with norm

So the integral of
is

The correct answer is that there is more variability in the heights of the volleyball team members.
The mean absolute deviation shows us how spread out the data is, so the larger the mean absolute deviation the higher the variability.
Both teams have players that are 76 inches tall, so the last two statements cannot be true.