In the diagram below XY and YZ are tangent to o what is the measure of XZ Sorry i can take a pic but ill describe it
Its a circle with a triangle-like shape on the left side of it, inside the triangle is 50, and on the right side of the circle is 230
A. 90 degrees
B. 180 degrees
C. 130 degrees
D.100 degrees
THANKS

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