To find an equivalent expression with only positive exponents, we can apply the properties of integer exponents. Let's break down the given expression step by step:
Expression: 59⋅5−13
Step 1: Apply the property of multiplication in exponent notation, which states that a^m * a^n = a^(m+n):
59⋅5^-13 = 5^9 * 5^-13
Step 2: Apply the property of negative exponents, which states that a^-n = 1/a^n:
5^9 * 5^-13 = 5^(9-13)
Step 3: Simplify the expression:
5^(9-13) = 5^-4
Therefore, the equivalent expression with only positive exponents is 5^(-4), which can be rewritten as Start Fraction 1 over 5^4.
So, the correct answer is: Start Fraction 1 over 5 superscript 4 baseline end fraction