18. If the moon were four times the distance from the Earth than it currently is, the amount of time it would take to go around the Earth would be roughly (the current orbital period of the moon is about four weeks)
A. 8 weeks
B. 11 Weeks
C. 16 Weeks
D. 32 Weeks
E. 64 Weeks
T is directly proportional to (r)^3/2
The Attempt at a Solution
I absolutely am awful at problems that deal strictly with proportions.
T = (4)^(3/2)
(4)^(3/2) = 8 weeks
Since the coefficient in front of "T" is "one," should I multiply four by eight since the problem states the period of the moon is about four weeks long?
Also, is there a maximum number of times a person can post in one day? I feel like I post a lot.