The PDR is a thick volume that commonly used to provide guidance for prescription drugs available in the United states. The PDR is the most commonly used drug reference . The information is the same as the leaflet found in the drug package also known as the package insert. Drug companies pay to have their drugs included, so many generic medicines will not be found in the book.
For over 60 years, physicians and researchers have turned to PDR for the latest word on prescription drugs. It includes comprehensive and up-to-date information on more than 4000 FDA approved drugs.
The distance the bird flies is (17,000 + 600 + 14,400) = 32,000 km.
His average speed is (32,000 km)/(122 days) = 262.3 km/day.
The bird ends up (17,000 - 600 + 14,400) = 30,800 km north
from where he started.
His average velocity is (30,800 km)/(122 days) = 252.5 km/day north .
Your answer would be i think repetition