There are 80 runners to start a race. in the race, 1/4 of them dropped out. in the second half of the race , 1/5 of the remaining runners dropped out. how many runners finished?

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.