The Petersons have an apple-pressing machine that they use to make apple juice. The first pressing gets about 1/4 of the total juice in the apples. Each succeeding pressing extracts about 1/4 of the remaining juice in the apples. What is the least number of pressings it will take to get at least of the apples' juice? What is the least number of pressings it will take to get at least 6/7 of the juice?

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The Petersons have an apple-pressing machine that they use to make apple juice. The first pressing gets about 1/4 of the total juice in the apples. Each succeeding pressing extracts about 1/4 of the remaining juice in the apples. What is the least number of pressings it will take to get at least of the apples' juice?

What is the least number of pressings it will take to get at least 6/7 of the juice?

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