Find the volume of a right circular cone that has a height of 9 m and a base with a
circumference of 3-3 m. Round your answer to the nearest tenth of a cubic meter.

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Find the volume of the solid whose base is the region bounded by f(x), g(x) and the x-axis on the interval [0, 1], and whose cross-sections perpendicular to the y-axis are squares. your work must show the integral, but you may use your calculator to evaluate it. give 3 decimal places for your answe

Anyone know these questions? i need ,.