Final answer:
To simplify the expression 6y^-4 to have only positive exponents, rewrite it as 1/(6y^4). Negative exponents indicate that the base should be on the opposite side of the fraction, making the exponent positive.
Step-by-step explanation:
The student has asked to simplify the expression 6y with the power of -4 and write it using only positive exponents. To convert negative exponents to positive ones, we remember that a negative exponent means that the base and its exponent should be moved to the opposite side of the fraction. In this case, since we have no fraction, we can consider that 6y^-4 is over 1.
So the conversion will be as follows:
Write 6y^-4 as 1/(6y^4).
By doing this, the exponent is now positive, and the expression is simplified as required.
Therefore, the simplified form of the expression with a positive exponent is 1/(6y^4).