Step-by-step explanation:
Using Pythagorus theorem:

Therefore,

i want to say its (C) but it might also be (B)
Proabably. 5 because if there is 2 sides on a coin then you should divide 10÷2 which is 5.
Answer:
156.86
Step-by-step explanation:
136.40 + 15% is 20.46 added to 136.40 is 156.86