The height h of a rocket t seconds after being launched can be modeled by the equation: h(t)=-1662 +160t.
a) How many seconds after the launch does the rocket reach its maximum height?

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?