Which equation shows an example of the associative property of addition? (–4 i) 4i = –4 (i 4i) (–4 i) 4i = 4i (–4i i) 4i × (–4i i) = (4i – 4i) (4i × i) (–4i i) 0 = (–4i i)

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)=