What is the inequality and solution of: the sum of a number and 19 is at least 8.2 ?

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

In the 30-60-90 triangle below side s has a length of and side r has a length

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)