Identify the vertices, foci, direction of an opening of (x^2)/81 - (y^2)/4 = 1

Sorry guys but as you have a small brain

Which number completes the inequality? 2/3 < _ < 7/9

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?