Ernesto baked 3 cakes in \(2\cfrac{1}{2}\) hours. Assume that the number of cakes baked varies directly with the number of hours. Write and solve a direct variation equation to find how many cakes can he bake in \(7\cfrac{1}{2}\) hours.
Persevere with Problems A company logo has four concentric circles. Suppose you graph the points(diameter, circumference) and connect them with a line. In terms of pi\((\pi)\), what is the slope of the resulting line?