Answer:
student a answered correctly
Step-by-step explanation:
student b didn't multiply the crossproducts
Answer:
It's False
Step-by-step explanation:
It does refer to whether the data measures what it claims to measure.
Hope i helped you!
BE is parallel to CD, therefore, m∠BEC=m∠ECD, therefore mBC=mDE
BE is the diameter, so Arc BE is 180 degree
mBC+mCD+mDE=180
replace mCD with 3mBC, and replace mDE with mBC: mBC+3mBC+mBC=180
5mBC=180
mBC=180/5=36
mCD=3mBC=3*36=108
the inscirbed angle m∠ECD= the measure of arc DE=36