What is the volume of a cone with a radius of 18cm and a height of 10cm? use 3.14 for pi. round your answer to the nearest tenth

What is the sum of these mixed numbers 2 1/8 + 4 3/8

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

When y’all answer can y’all explain too !