A steel bar has a mass of 800 kilograms and a volume of 0.1 cubic meters. Calculate its density.
Write your answer as a whole number.
kilograms per cubic meter

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).