Answer:
first one
28.26 im not 100% correct i dont think
To find the diameter, you use the formula: 2x. we use 2x because the radius is 2 times the diameter.
so, if the radius is 3,980, then we substitute that into the formula.
2(3,980)
this will give us 7960. the diameter is 7960 miles.
27 divided by 15 is 1.8, so that should be the correct answer.
Answer: -107pi/45 radians
