Tatiana makes $8 per hour mowing lawns and $12 per hour babysitting. she wants to make at least $96 per week, but can work no more than 12 hours a week.

The distributive property allows you to say that 3(x − 1) = 3x −

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

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?