Rachel is baking a cake but does not know if she wants to bake a round or a square cake. which cake has a larger area a round 8 inch cake or a 9 inch cake? how much larger is it?

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?