Answer:
1
Step-by-step explanation:
This is a quadratic function which is parabolic in shape. By definition, it has a vertex which serves as the (only) max or min point; 1 turn.
Multiply both sides by 5
r = 35

This may look scary, but all you have to do is distribute, first:

Now it's much easier (remember to distribute the negative):

So, the entire thing simplifies to
-2c. NEAT!
Answer: 16, 477
Step-by-step explanation:
This number is not between 16500 or 16700
The area would be 25π inches.
Since the cross-section goes through the center of the sphere it will be a circle. The area of a circle is given by A = πr²; for our circle, since the diameter is 10 inches, the radius is 5;
A = π(5²) = 25π