Question: Please explain how to do these two questions. 1: A road tunnel in the shape of a parabola has a maximum height of 9m. The

Please explain how to do these two questions.

1: A road tunnel in the shape of a parabola has a maximum height of 9m. The tunnel's width at the base is 12m. What is the maximum clearance at distance of 1 m from the edge of the tunnel.

2: A theatre company currently charges $12 a ticket. At this price, 450 people attend each show. For every $2 increase in the price, 25 fewer people will attend the show. What is the maximum revenue?

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