The Bookmark is an online bookseller. When books are purchased, the shipping fees are added to the price. The table shows how shipping fees are calculated. Purchase Total Less than $20 $20-$34.99 $35-$49.99 Greater than $50 Shipping Fees 3% of total 4% of total 6% of total 8% of total Sonja bought 3 books priced at $11.35, $9.50, and $14.70. Part A Determine the shipping fees for Sonja's order. Round the answer to the nearest hundredth if necessary. $ Part B What is Sonja's total cost including shipping? IOT Ha E

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