Simplify: x^5/8 • x^3/8; 0 (is greater than or equal to) x

Plz asap what is the range of the cluster in the scatter plot a. between 4 and 8 years of experience b. between $40,000 and $60,000 c. between 6 and 12 years of experience d. between $10,000 and $60,000