Suppose a2 - 64 represents the area of a rectangle. if the length is represented by a + 8, what would represent the width? a) a - 8 b) a + 8 c) (a + 8)(a - 8) d) (a - 8)(a + 8)

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?