Answer:
Option C. 
Step-by-step explanation:
we know that
The volume of a cylinder is equal to

we have


substitute


Step-by-step explanation:
The value of b will be 43° as it is vertically opposite angle.. !!
Answer:
54.5
Step-by-step explanation:

Answer:
best way would be calendar
Step-by-step explanation:
then stop watch
heartbeat
finding height?
(im not totally sure because it depends what type of timekeeping you're talking about)