Find the length of the missing leg of a right triangle with side lengths 14 and 50

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.