If your average monthly cost of running a 42" plasma television is $3.50, and the wattage for a 42" plasma screen is 400 how many hours per month do you have the television on?

Restrictions on f(x) = 1/x+5 and g(x) = x-2

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%

In an improper fraction, is the numerator equal to, less than, or greater than the denominator