In the first digit, there are 6 possibilities. In the second, there are 5, because you can't use the digit you used before. In the third, there are 4, and in the fourth, there are 3. So,
6*5*4*3=360
There are 360 different possible four-digit numbers
9.42 is the circumference, for future refernce its just pi times diameter :)
Answer:
Step-by-step explanation:
7+8 is the answer
But it can also be 11
