Ype the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.
a submarine is 1,275.5 feet below sea level. it dives down 215.5 feet and then rises 125.5 feet. finally, the sub dives down another 122.4 feet. assume sea level is at an elevation of 0 feet.
after its final dive, the submarine is at an elevation of
feet.