Balloons and Laughs Inc. is a small company that entertains at children's birthday parties . B & uses a complicated formula to calculate its prices, taking into account all of its costs. The price equation is p(x) = 4 * root(3, (8x + 3) ^ 2) + 25 , where x is the number of person- hours supplied for the party at a price of p(x) . For example , if x = 4 , four clowns will come for one hour , two clowns will come for two hours , or one clown will come for four hours .