Chapter 6.1, Problem 3E

The half-life of a radioactive material is about 34.2 years. How much of the material is left after 20 years?

A basketball has a volume of about 455.9 cubic inches. Find the radius of the basketball (accurate to three decimal places).

Compute the number of cubic centimeters of iron required for the cast-iron plate shown. The plate is 3.50 centimeters thick. Round the answer to the nearest cubic centimeter.

The numerical value of the volume of a cube equals the numerical value of its total surface area. What is the length of each edge of the cube?

Zaidah plans a raised flower bed 2 ft high by 12 ft wide by 15 ft long. The mulch, soil, and peat mixture used to fill the raised bed costs 15.75 per cubic yard. What is the total cost of the ingredients used to fill the raised garden?

A seamless brass tube and brass flange assembly is shown. The tube is pressed fit into the full 1.250-inch plate thickness. The brass used weighs 0.305 pound per cubic inch. Find the total weight of the assembly. Round the answer to the nearest tenth pound.