The frostburg-truth bus travels on a straight road from frostburg mall to sojourner truth park. the mall is 5 miles west and 3 miles south of the city center. the park is 4 miles east and 4 miles north of the center. how far is it from the mall to the park to the nearest tenth of a mile?

1.4

5.7

5.8

11.4

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