Solve for the value of r

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

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]