Here is a related rates problem: All edges of a cube are expanding at a rate of 5 cm/sec. Let the length of the edge be denoted by x. How fast is the surface area (denoted by S) changing when each edge (x) is 3 cm? For this question, select all of the items below that we KNOW from the context of this problem. We will be actually answering this problem in a later question. x=3 O dx/dt or x'=5 dS/dt or S'=5 dx/dt or x'=3

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