(15 points) A tank is shaped like an inverted cone, is a quarter full of water, and has a radius of 6 meters and a height of 30 meters. Find the work needed to pump the water from the tank. Use the density of water as 1000 kg/m3 and g = 9.8 m/s2. 

Calculate a positive angle and negative angle that is coterminal with the given angle. 

From the top of a 48 meter cliff overlooking the desert, an observer measures the angle of depression from the top of the cliff to a cactus below to be

Using the problem in number 6. State the Test Statistics.

Using the problem in number 12. State the conclusion.

Following the defeat of Germany, 

(15 points) Evaluate: §#8747;9-x2x2dx

The underconsumption theory 

A group of 49 randomly selected students has a mean age of 22.4 years. Assume the population standard deviation is 3.8. Construct a 98% confidence interval for the population mean.

(15 points) Evaluate: §#8747;2+xx3+9xdx