12) A square with side length x is cut from the right triangle shown below. Write an equation in terms of x that represents the area A of the figure after the corner is removed. What value of x will result in a figure that is 34
of the area of the original triangle? Show how you arrived at your answer. (Challenge Question)
16
X
8
12) Tholls Coast Guard's Tironco vam includoc nuoctinnc doaling with tho hroalina ctronath of a lino The
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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?