I think A is 145m...
200m+ (-55m) since the submarine is under water it will be negative which ends up to be 145m
1/2 is half of a whole
whole= 1/1. 2/2, 3/3, 4/4 and so on
1/2 are numbers that can be simplify to halves= 1/2, 2/4, 3/6, 4/8, 5/10 and 1/2 are half of the denominator
The answer would be B as half of 6 is 3 and 3 x 5 is 15 , 15 x 10 is 150 :)<span />
