What times what equals 59

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Acircle has a circumference of 28.36 units what is the diameter of the circle

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?