Guam would be the warmest given out of the 3 degrees you’ve given
24 > 3 > -10
To find the circumference of a circle you have to multiple the radius by 2 and also by pi. So, to find the radius when given just the circumference, who have to do the reverse operation and divide the circumference by 2 and also by pi to get the answer of 22.92993631, which you could of course round.
30 because you add 8 and 7 then add it by itself or multiply it by 2