Help Me, Now! D. What is the combined total of both bank accounts after two weeks?​

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

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.