Problem
Suppose the supply and demand for a certain textbook are given by supply p+1/3q^2, demand =-1/3q^2+40, where p is price and q is quantity. Find the demand quantity and the supply quantity at a price of $30 each.
The response must include a reference list. Using Times New Roman 12 pnt font, double-space, one-inch margins, and APA style of writing and citations.