exam Maths Puzzle Numerical Ability

The cost of manufacturing tires is given by c = 100(x + 4)^1/2, where c is the cost in dollars and x us the number produced. What is the cost when no tires are produced?

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exam Other Question

Maximize the objective function C = 4x + 5y with the constraints x + y <- 5, x + 2y <- 6, x >- 0, y >- 0

Thank you Ronald wants to sell his car through a broker who charges a commission of 10% of the selling price. Ronald still owes $11,025 on the car. Ronald must get enough to at least pay off the loan. What is the range of the selling price?