Answer all parts of the question that follows. a) Identify TWO methods that China used to expand its empire after the fall of the Ming dynasty. b) Identify ONE way in which the Songhay Empire used religion to legitimize its rule. c) Explain TWO techniques implemented by the Aztec Empire to generate revenue and to consolidate its power.

You're asking in the ap section, so i'll give the ap calculus-style answer. alternatively, you can find the vertex of the parabola and use the "y"-coordinate as the answer.

the maximum height can occur at a critical number, that is, a number  such that  .

the derivative of  can be calculated as follows:



find a value of  that is a zero of the derivative:


this is parabola that is opening downward; we can assume there is a maximum at  .

to find that maximum, calculate  .