Harry's school is selling t-shirts to raise money for the archery team. the school will receive 35% of the total sales which can be modeled by the equation y = 0.35x, where x represents the total number of sales. what is the meaning of the x-intercept in the equation? a) schools percentage of the sales b) amount of money raised with no sales c) t-shirt suppliers percentage of sales d) number of sales when no money has been raised

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