3.019 because if the digit after the place you're looking at is 5 or more then you round up.
D, hope this helps because 1/2 is less than 1. and 5*1/2 is 2.5 and that is less than 5
18 or 3 * 6 because to find out how many possible contengencys you muktiplyy the factors.
A.
Because in mathematics, a geometric progression, also known as a geometric sequence, is a sequence of non-zero numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio.
