Question

$r \frac{8}{11} r \frac{10}{11}$ Simplify. Write your answer using a single, positive rational exponent

Answer 1

hmmmm I take it  you meant those rationals to be exponents, so hmmm asumming that,

$\bf r^{^\frac{8}{11}}\cdot r^{^\frac{10}{11}}\implies r^{^{\frac{8}{11}+\frac{10}{11}}}\implies r^{^\frac{18}{11}}$