The ratio of the number A people who all are iPhone to the number of people who on the android is 7:2 there were a 108 people surveyed how many people have an android

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

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?

I’m really confused and need to learn this