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The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Find the percent error of the measurement 4 cm