Need help on c. and d.

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

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]

Atown has a population of 7000 and grows at 3% every year. to the nearest year, how long will it be until the population will reach 12400?