Help me please... Mary took 7 hours to read 210 pages
the relationship between x, the number of hours she reads, and y, the number of pages read was 1x=30y.
How long will it take Mary to read 80 pages at the same reading rate? Show or explain how you got your answer.

Which expression gives the exact value of x?

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

For each given situation, determine if the method of randomization is either appropriate or not appropriate