121: (92 − 52: 5.14) + (23)2 = me pueden ayudar porfa es urgente

Given the graph below state whether or not the relation is a function, and give the domain and range.

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.)

Which rational number could be graphed between -4 and -5