Starting at home, nadia traveled uphill to the grocery store for 30 minutes at just 4 mph. she then traveled back home along the same path downhill at a speed of 12 mph. what is her average speed for the entire trip from home to the grocery store and back?

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8