exam Maths Puzzle Numerical Ability

m varies directly with n; m=144 when n=8

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exam Other Question

A company uses the formula C(x)= 0.02x^2-3.4x + 150 to model the unit cost in dollars for producing x stabilizer bars. For what number of bars is the unit cost at its minimum? What is the unit cost at that level of production? The greater of two consecutive even integers is six than three times the lesser. Find the integers.