How to write 32,005,008 in two other ways

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

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.

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.