The profit a company makes is its revenue (R) minus its costs (C). For a clothing company C=3x +80 and R=12x-0.02x2 where x is the
number of items sold. Which expression does not represent the profit
in terms of the number of units sold?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

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?