The area covered by a city is 20 square miles. The area grows by a factor of 1.1 each year since it was 20 square miles. a. Explain why the area, a, covered by the city, in square miles, is a function of t, the number of years since its area was 20 square miles.

come

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it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

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step-by-step explanation: