Math questions, please help out ASAP!! Anything would help, I appreciate it!

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

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]