Mr. karly's math test scores are normally distributed with a mean score of 87 and a standard deviation of 4 using the empirical rule, about 99.7% of the data values lie between which two values?

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

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?

About 9% of th population is hopelessly romantic. if 2 people are randomly selected from the population, what is the probability that at least 1 person is hopelessly romantic?