A class collected data on the weight of each hardcover textbook in their backpacks. The mean weight of the books was 2.3 pounds with a standard deviation of 0.7 pound. If the textbooks were softcover editions, each would weigh 0.3 pound less. What would be the mean weight and standard deviation of the softcover editions of these same books?

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?