Given cell phone sales and prices for Q1 2009 and 2010, find the demand function q(p). Predict sales at \$156. Also, determine the sales decrease per \$1 price increase.
Next week, you charged \$9 per guest with 39 guests on average. (a) Find the demand equation q(p)=.
(b) Find the revenue function R(p)=.
(c) Given costs C(p)=−25.5p+488, find profit P(p)=.
(d) Find break-even entrance fees, rounding to two decimal places.
Miss Lee's tax is \$4500. Find her net chargeable income using the tax rates: 2\% for \$40000, 7\% for next \$40000, 12\% for next \$40000, and 17\% for the rest. Round to the nearest dollar.