Find a polynomial of degree 3 with zeros of 4, 2i and -2i

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Tan198=asin164=? how to solve this? ?