The museum of science in boston has an exhibit in which metal balls drop down a chute, bounce around, and wind up in one of 21 bins. after 1000 balls have dropped, the heights within the bins clearly follow a bell-shaped curve. if the standard deviation is 3 bins, approximately how many balls are in bins 1 through 7?

Solve for x by completing the square. 2x^2-4x+7=0

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.