Final answer:
When rewriting 256 with a positive exponent, we can represent it as 2.56 × 102. To simplify, we multiply the digit term and add the exponents, resulting in 2.56 × 104.
Step-by-step explanation:
When rewriting 256 with a positive exponent, we can use 10 as the base and the exponent will be equal to the number of zeros in 10. Since 10 has two zeros, we can rewrite 256 as 2.56 × 102.
To simplify, we multiply the digit term, which is 2.56, and add the exponents of the exponential terms, which are 2. Thus, the simplified form of 256 is 2.56 × 102+2 = 2.56 × 104.