Write a system of equations to describe the situation below, solve using any method, and fill in the blanks. Joseph works in the shipping department of a toy factory that makes radio-controlled helicopters. Small helicopters weigh 2 pounds each, and are shipped in a container that weighs 16 pounds. Large ones, on the other hand, weigh 5 pounds apiece, and are shipped in a container that weighs 13 pounds. If these boxes can hold a certain number of helicopters each, all of the packed containers will have the same shipping weight. How many helicopters would fit in either container? What would the total weight be? If either container holds helicopters, it will weigh a total of pounds once it is packed for shipping. S

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