The principal at Marina Middle School wants to determine if the 120 students in the seventh grade prefer to visit Catalina Islan
d or Camp Mosaic for their end-of-year trip. Which of the following is a representative sample of the population? Select all that apply A. 20 sixth-grade students, 20 seventh-grade students, and 20 eighth-grade students
B. 10 seventh-grade boys and 10 seventh-grade girls
C. 25 seventh-grade students
D. 15 seventh-grade boys and 5 teachers
E. 25 students from the school
First walk=descend of 1024 feet in 17 minutes second walk=descend of 500 feet in 7 minutes
so in total she descended 1024+500=1524 feet in 7+17=24 minutes as an average rate this equals 1524/24=63.5 feet/minute descended or an average rate of -63.5 feet/minute in altitude (note the minus)
