The cookie jar closes at 9:00 p. m. During the last 15 minutes they are open, they sell all their goodies at 1/3 off the regular price. Laura bought 3 macadamia cookies at 65 cents each at 8:30 p. m. How much would she have saved if she had waited 15 minutes?

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%

Solve the triangle. a = 21°, c = 105°, c = 5

Determine the area of a triangle with (see picture below)