Leo is unable to relax. He feels constantly "keyed up" and restless. His muscles are chronically tense, he is hypervigilant and apprehensive about the future, he often feels his heart pounding and he has trouble sleeping. His symptoms sound most like disorder.

Simba travel agency arranges trips for climbing mount kilimanjaro. for each trip, they charge an initial fee of \$100$100 in addition to a constant fee for each vertical meter climbed. for instance, the price for climbing to the shira volcanic cone, which is 30003000 meters above the base of the mountain, is \$400$400. let f(d)f(d) denote the fee of a trip ff (measured in dollars) as a function of the vertical distance climbed dd (measured in meters). write the function's formula. f(d)=