Mathematics, 26.10.2020 02:50, kukisbae

A forest fire leaves behind an area of grass burned in an expanding circular pattern. If the radius of the circle of burning grass is increasing with time according to the formula r(t) = 3t + 5, express the area A burned as a function of time, t (minutes).

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A forest fire leaves behind an area of grass burned in an expanding circular pattern. If the radius...