A car wash reduced the price of a basic wash as a promotion and test of the market. With the price at $8 the average monthly sales has been 29000. When the price dropped to $6, the average monthly sales rose to 35000. Assume that monthly sales is linearly related to the price. Required:
What car wash price would maximize revenue?

Acircle has a circumference of 28.36 units what is the diameter of the circle

Maurice has 54 fewer comic books than rebecca.they have 130 comic books together .how many comic books are in maurices collection ? how many comic books are in rebeccas collection

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?