6) Each day, Valerie charges her lunch account for her lunch. If the cost of the lunch is $3, then by how much has her lunch account been impacted
over a period of 15 days? (A charge on her account would mean a
negative value)
Your answer

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

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?