An urn contains eight blue balls and seven yellow balls. if six balls are selected randomly without being replaced, what is the probability that of the balls selected, two of them will be blue and four of them will be yellow

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

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%

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?