Aroller coaster starts from a deck at an elevation of 20 feet above the ground on the first hill climb 78 feet and then drops 85 feet. on the second hill the coaster climbs is 103 ft and then drops 110 ft how far below or above the deck is the coaster after the second hill?

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?