PLEASE HELP ME WITH THIS MATH PROBLEM WILL GIVE BRAINLIEST IF CORRECT :)

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

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

What is the absolute value of the complex number -4-sqrt2i