Here is my problem: Sailboat stability. To be considered safe for ocean sailing, the capsize screening value C should be less than 2 (www.sailing.com). For a boat with a beam (or width) b in feet and displacement d in pounds, C is determined by the function C _ 4d_1_3b.

a) Find the capsize screening value for the Tartan 4100, which has a displacement of 23,245 pounds and a beam of 13.5 feet.

b) Solve this formula for d.

c) The accompanying graph shows C in terms of d for the
Tartan 4100 (b _ 13.5). For what displacement is the
Tartan 4100 safe for ocean sailing?
How to solve for 'b'

Here is A;
C=4d^-1/3
C=4(23245)^1/3(13.5)
C=4(.035)(13.5)
C=.472(13.5)
C=1.89

Question

Here is my problem:  Sailboat stability. To be considered safe for ocean sailing, the capsize screening value C should be less than 2 (www.sailing.com). For a boat with a beam (or width) b in feet and displacement d in pounds, C is determined by the function C _ 4d_1_3b.

a) Find the capsize screening value for the Tartan 4100, which has a displacement of 23,245 pounds and a beam of 13.5 feet.

b) Solve this formula for d.

c) The accompanying graph shows C in terms of d for the
Tartan 4100 (b _ 13.5). For what displacement is the
Tartan 4100 safe for ocean sailing?
How to solve for 'b'

Here is A;
C=4d^-1/3
C=4(23245)^1/3(13.5)
C=4(.035)(13.5)
C=.472(13.5)
C=1.89