Which expression converts 100 inches per min to feet per minute

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

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The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base