If you turn the ratio 1:3 into a fraction it would be 1 over 3 I hope this helps
It does not look like Suro even made an error. She took the square root of both sides to get x = 7, I don't see any problem here.
25 mg. = 2.5 cg.
25 mg. is less than 25 cg.
When dividing indices with the same base, the rule is to subtract the index of the denominator from the index of the numerator, and to keep the base the same.
In this case, the index of our denominator is 6, and the index of the numerator is 2.
2-6 = -4
The answer is
.