The absolute value of 4+7i is equal to the square root of?

The price of a coat increased from $78 to $92. what is the price increase percentage?

Determine the quotient and remainder when (6a3)+11a2-4a-9) is divided by (3a-2) express your answer in the form q(a) + r(a)/d(a)

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)