if the entire angle ABC is 130° and angle DBC is 30° (which is part of angle ABC) you subtract the 30° from the entire angle ABC (130°) to get 100° for angle ABD
<span>To solve it, use the quadratic formula with (½)(-32.174 ft/s²) = a, 38 ft/s = b, and 30 ft = c. There are two answers; the only positive answer is t = 2.986 s </span>
