Can somebody please help me on this please

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

Residential construction is expanding in florida, the expansion has caused fragmentation of habitats, one of the results of the increased construction is a decrease in the number of large predators such as the coyote, black bear and pool panther, which will be the most immediate local result of this fragmentation? 1)large predators will become extinct 2)decrease in middle sized predators 3)increase in population of top carnivores 4)increase in population of prey species

What does the number 18.9984 represent in the image?