Answer: 7√a^5
Explanation:
Hi, since a is the variable and Five-sevenths is a fraction 5/7 the expression mentioned in the statement is a^5/7.
To express the same expression in radical form the denominator of the power (7) becomes the root, and the numerator of the power (5) becomes the power to which the base (a) is raised.
Mathematically speaking:
7√a^5