exam Maths Puzzle Numerical Ability

How much water should be added to one liter of pure alcohol to make a mixture of 50% alcohol?

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exam Other Question

Describe the transformations on the following graph of f(x)=e^x. State the placement of the horizontal asymptote and y-intercept after the transformation. For example, "left 1" or What is the slope of the line 3x= 5y-3?