A circle has a diameter of 12 yd. What is its circumference? Use 3.14 for 11, and do not round your answer. Be sure to include the correct unit in your answer.

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Find the commission on a $590.00 sale if the commission is 15%.

The perimeter of the rectangle is 120 feet. if the length of the rectangle is ten feet more than the width ,what are the dimensions (length and width) of the rectangle?