13.99 kilometers is the diameter.
Divide the circumference (43.96) by 2(pi), which should give you a radius of 6.99. You should then proceed to multiplying that by 2, since radius is half of the diameter, giving you 13.99.
Answer:
i believe your answer is A
Explanation:
a longer wavelength means a lower frequency, and a shorter wavelength means a higher frequency!
Just be honest with them and everything will work out :)
