A prime number is a number which can only be evenly divided by itself and 1. 74 can be divided evenly by 2 and 37, so it is not prime.
8.2973
74
composite as it can be divided by 2
That depends what number you started with.
Since 74 is an even number, it can be divided by 2 without getting a remainder. Therefore, it is a composite number.
0.0154
4.0405
0.1725
0.0811
74
74