exam Maths Puzzle Numerical Ability

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A drug manufacturing company wants to manufacture a capsule that contains a spherical pill inside. The diameter of the pill is 4mm and the capsule i

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Directions: For each equation in Oral Exercises 1 - 12, find any rational roots. if the equation has at least one rational root, solve it completely.

2) x^3+x^2-4x+4=0
3.40 for 3 doughnuts and 2 coffees, then 3.60 for 2 doughnuts and 3 coffees. What is the bill for 1 doughnut and 1 coffee?