Lets get started :)
The area formula of a cylinder is:
Area =

We are given:
The radius: 6 units
The height: 15 units
Apply the formula!
A =

=

=

units²
Your answer will be
option D
Well it shows what your looking for. For example, when you use a line graph you use it to show time and what happens to like lets say a ecosystem and what happens to it over time. That's just one of a lot of different ways to show and analyze patterns in life.
93×10^6 = 93000000
It is equal to 93 million (with exactly 6 zeroes).