exam Maths Puzzle Numerical Ability

In 1921, President Taft decided that the ratio of the length to the height of an American flag should be 1 to 1.9. If a flag is 25 square feet, how long and tall is it?

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exam Other Question

Find sin A if cos A = 8 over 9 and A is in quadrant 4. I am unable to work out the following:

Find the arithmetic operation for adding the following complex numbers (4+j6)+(7-j3)+(7-j8) thanks for any help.