Simplify \frac{10a^3}{55a^2} when a=3.

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

What is always true about a positive integer raised to a negative odd power?

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]