The function S(t) gives the average annual sea level in meters in a particular city as a function of t, the number of years before 2007. Express each of the following in mathematical symbols. (a) The average annual sea level in meters in this city in 2007. S(2007) X (b) In 1988 the average annual sea level in meters in this city was 7.4. S(-19) = 7.4 X (c) The average annual sea level in meters in this city was the same in 1987 and 2003. |S(20 - 4) = 0 x

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A:

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A: Solve and compare

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A: 1st draw a graph.

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A:

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A: Consider the given function

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A: Given, f(x) is a one-to-one function and f(15)=5.

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