A psychologist tests the memory span of children. Seven-year-old Perry is asked to recall the following list of numbers: 2, 4, 7, 8, 3, 1, 5. Given the typical short-term span of a 7-year-old, how many numbers will Perry remember?

Suppose there are 10 five and six-year-old attending a birthday party. when a 30 year old mother walks into the room with an infant in her arms, what happens to the mean age in the room? what happens to the standard deviation of ages in the room? a. the mean and standard deviation of both change. b. the meaning will change, but the standard deviation will stay approximately the same. c. i mean will stay approximately the same, but the standard deviation will change. d. the mean and standard deviation will both stay approximately the same.

Which statement best describes the polynomial

What are the sotions to the quadratic equation 9x^2=4