verry very sorry for this
Answer:
3. 100% because you know they will all land tails.
4. 30 ish% Because you know the quarter will land making the other two a 50/50 chance.
The 2nd one might not be right
The answer is (1,4) and (-1,-4)
The diameter is approximately 24 cm. The radius is approximately 12 cm. The area is approximately 144 cm2 or 452 cm2.