Answer:a
Step-by-step explanation:
The area of a circle is

The radius is half the diameter, so we have

Step-by-step explanation:
This should give you an idea the acceleration here is 9.81 because gravity and the equation is a kinematic equation
Answer:
I think the awnser is 250
1. The surface area of a cone S is S=

, where r is the radius of the base and l is the slant height.
2. The slant height l is found as follows:



3.


4. The answer is C