Chapter 6 Rational Exponents and Radical Functions - Evaluate nth Roots and Use Rational Exponents - 6.1 Exercises - Skill Practice - Page 417: 42

-27.86

You should use a calculator for this problem. We need to focus on rounding correctly. Since this is a solitary calculation, we will round 5 up always. We can type this in as $(-8)^{8/5}$ We get -27.857 after plugging this in. $-27.86$ is the rounded answer