China Garden Restaurant recorded 457 online orders in April 2013. That represented an increase of 220% compared to the number of online orders in April 2001. Assuming that the number of April online orders increased at the same rate each year, how many online orders were recorded in April 2006?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Twelve less than a number is at most 20

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?