Correct scientific notation has only one number to the left of the decimal point.
The correct one would be: 3.4 x 10(exponent 3)
The answer is 2^(9/10). I did it assuming with the ^5 you mean the 5th root of 4
If the ratio is 90:3 and there are 4 groups of 3 in 12, then the ratio would then be 450:12, leaving you with 450 as the answer. Hope I helped
5/15 depending on what the answers are