Divide 468 in the ratio 4:5

Aladder that is 30 ft long needs to reach 27 ft up a building. what should the angle of the vertical be?

Need on this geometry question. explain how you did it.

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]