What does it mean when you have ratio and it says explain the meaning? ?

Consider circle o, where and . m∠bpd °. °.

Aliter of water contains about 3.35 x 10^25 molecules. a certain river discharges about 2.9x 10^8 l of water every second. about how many molecules does the river discharge every minute? write your answer in scientific notation

Given the equation    = 5, solve for x and identify if it is an extraneous solution