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What are the relative frequencies to the nearest hundredth of the columns of the two-way table?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27