I believe the answer should be B. Because of the standard circle equation.
Answer: Stratified Random Sample
Hope this helps ʕ•ᴥ•ʔ
Im not sure if im correct but I think the answer is 82 hours.
Answer:

Step-by-step explanation:
1) Add the whole numbers first.

2) Join the denominators.

3) Simplify.

hence, the answer is 3 4/5.
Answer:
12
Step-by-step explanation:
4hoursx3 temp increase=12