What is the surface area of a cylinder with a height of 20 meters and a diameter of 8 meters?

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.