Somebody PLEASE HELP ME

answer has to be in simplest radical form
find k

Rewrite the following without an exponent. (5/8)-1

What is the ratio of the length of an object in yards to the length of the same object in miles?

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.