Whale watching tours out of Boston harbor are very popular. Ship Ais 10 miles east of ship B. Ship A spots a whale on a at an angle of 40° South of West. Ship B spots the same whale on a 30° South of East How far is the whale from
Ship A? Draw a large neat diagram-which includes all given information and any variable you will solve for. [This must
be done on a separate sheet of paper and attached to the test - 1pt)

Aresearch study is studying the effects of a new drug for osteoporosis alzheimer's disease (ad) for women above the age of 65 years. a group of individuals with osteoporosis is randomized into two groups. one group is treated conventionally, and the second group is treated with the new medication. assessments are made at 3, 6, 12, 36, and 48 months. the conventionally treated group is assessed for ad using a serum blood test, and the treatment group is assessed for ad using a pet radiotracer that binds to beta-amyloid plaques. in comparing these 2 trial arms, the authors of the study may encounter which type of bias? a. selection bias on the risk of developing b. measurement bias c. confounding bias d. recall bias e. lead-time bias