book Maths Puzzle Numerical Ability

What is the formula for the volume of a rectangular prism?

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book Other Question

Solve the quadratic equation by completing the square.

X square - 6x + 10 = 0

Thank you so much. A chemist has two mixtures of alcohol solution available to him, one that is 35% alcohol and another that is 77% alcohol. How many liters of the 35% alcohol solution should be add