A satellite camera takes a rectangle-shaped picture. The smallest region that can be
photographed is a 5-km by 7-km rectangle. As the camera
zooms out, the length I and width w of the rectangle increase at a rate of 2 km/sec. How long does it take for the area A to be atleast 5 times its original size?

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?