The biologist captures 20 fish out of a small lake behind his college. He fastens a maker onto each of these and throws them bsck in the lake. A week later he again catches 20 fish. Of these 20 fish 2 have markers on them. How many fish could Dr. Ji estimate are in the pond ?

After reading 80% of her e-mails in her inbox, danette still has m unread e-mails. which of the following expressions could represent the number of e-mails danette had in her inbox before she started reading? choose 2 answers: (choice a) 5m (choice b) 1.8m (choice c) 80m (choice d) m/0.8 (choice e) m/1−0.8