A person coughs when a foreign object is in the windpipe. The velocity of the cough depends on the size of the object. Suppose a person has a windpipe with a 20-mm radius. If a foreign object has a radius r, in millimeters, then the coughing velocity V(r), in millimeters per second, needed to remove the object is given by V(r)= k(20r^2 - r^3), 0 <= r <= 20

where k is some positive constant. For what size object is the maximum velocity required to remove the object?

What is the solution of sqrt x+2-15=-3

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

Given the graphed function below which of the following orders pairs are found on the inverse function