ORLANDO, Fla. — A 17-year-old Florida girl who was attacked by a 9-foot shark last week learned she will have her leg amputated Tuesday. Addison Bethea, of Perry, was scalloping Thursday with her brother in Keaton Beach — in Taylor County — when a shark pulled her underwater, according to Tallahassee Memorial HealthCare. The shark bit Addison’s upper right leg, causing her to lose her quadriceps, TMH said. “The bite also caused massive nerve and vascular damage,” TMH said in a post. “The injuries to Addison’s leg are so extensive that they will require amputation just above the right knee, whi…