Assuming the coin is not weighted and is a fair and standard coin - the chance of flipping head is 1/2. You can either flip head or tails, there are no other possible outcomes.
The first one is independent, and the second one is dependent.
Answer: about 14pi inches
Explanation:
7 * 6.28319 = 43.9823
43.9823 / 3.14159 = 14.0000127324