In a different plan for area codes, the first digit could be any number fromnbsp 2 through 8, the second digit was either 4 comma 5 comma 6 7, and the third digit could be any number except 5 With this plan, how many different area codes are possible?

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

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?

Find solution of the linear equation y = 2/3x + 1/3