The polygon below is rotated 270 degrees counterclockwise about the origin, then reflected over the x-axis. what transformation will map the polygon back to its original image?

When turned about its axis of rotation, which shape could have created this three-dimensional object?

On saturday a souvenir shop had 125 customers. sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?

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%