How many 4x8 sheets of plywood does it take to cover a 960 square foot roof?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

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?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.