Suppose the leftmost digits of two numbers are 8 and 3 which number is greater explain

I'm terrible at math any here is appreciated.

If rt is greater than ba, which statement must be true ?

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]