The two triangles of similar to one another, the first smaller triangle have sides that are 15 ft, 12 ft, 18 ft. The Bigger triangle has sides that are 25 ft, 20 ft, 30 ft. What is the scale factor of the triangle? Will mark brainliest

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