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Rosalie is organizing a circus performance to raise money for a charity. She is trying to decide how much to charge fortickets. From past experience she knows that the number of people who will attend is a linear function of the price perticket. If she charges 5 dollars 1000 people will attend. If she charges 7 dollars 900 people will attend. How much shouldshe charge per ticket to make the most money?

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Plane 1 is flying North with a speed of 200 mph and at time t=0 is located 100 miles south of a control tower. Plane2 is flying in a straight line towards the control tower with a speed of 125 mph and at time t=0 is located 50 m East and100 miles S of the control tower. When are the planes closest ? How close do the planes get?

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