Answer:
1/2 is the probability
Step-by-step explanation:
21: The factors of 21 are 1,3,7,21
21 containers for the ice cream
You would do $32/ the price of the train tickets.
The surface area of a right cylinder is the sum of the areas of the lateral face and the circular bases. The lateral face is really just a rectangle with the same height as the cylinder and a length equal to the circumference of the circular base.
If the radius of the base is

and the height is

, then the surface area of the cylinder is

You're given that the area is

and the radius is

, so you have