All problems are from the text,
(7th edition) by
Freedman & Kaufmann.
* Don't worry about projection effects. All you need to measure here is the length of the tail as it appears on the sky. In reality, this is just its projected length which should be corrected for the angle at which the tail is viewed. This is a complication that makes the problem harder than intended.
** Extra credit.
Be sure to show your work. A simple "Yes" does not constitute a complete answer. You must write in complete sentences and show all mathematical computations to receive full credit. Your homework must be legible for us to grade it - please be neat!