Number of possible combinations = (4x3) ÷ 2 = 6
Answer: There are 6 possible combinations.
I think the answer is 360
In scientific notation, it would be 2x10^3.
An easy trick to help remember when it is a multiple of 10 is that you do the numbers that aren't zero (2) times 10 and the exponent is how ever many zeros there are after the other numbers (3).
