Isaak is writing an explicit formula to represent the sequence.64, 112, 196, 343, ...What value should he use as the common ratio in the formula? Write the answer as a decimal rounded to the nearest hundredth.

Divide each term by the term before it to find the common ratio: 112 ÷ 64 = 1.75. The next ratios, 196 ÷ 112 and 343 ÷ 196, are also 1.75. So Isaak should use 1.75, which is choice B.

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