Simplify
6sqrt20 + 8sqrt5 – 5sqrt45

Consider the function y = f(x)=3^x the values of f(1/2) and f(1/4). rounded to the nearest hundredth, are__and__ respectively

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

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.