book Maths Puzzle Numerical Ability

graph y = 3 sin x and y = sin 3x on the same axes. label the graph of each function.

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book Other Question

Two planes leave Chicago-one traveling due east and the other due west. The first travels 100 miles per hour faster than the second. How long will it be until they are 2000 miles apart? log2 x -log2 3=log 2(2x-5)