How do I solve for x

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π