Mathematics, 25.07.2019 23:50, solomander4

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?

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Starting at home, nadia traveled uphill to the grocery store for 30 minutes at just 4 mph. she then...