Tan is opposite divided by adjacent and then square root the division answer
Assuming you mean angle ABC and not 2ABC?
Since ray BD bisects angle ABC we can set the two angle measures given equal to each other.
2x+7=4x-41
Solve for x=24
Plug in the x to find angle ABD 2(24)+7=55
therefore angle ABD is 55 and angle DBC is 55 so angle ABC is 110
40%=0.4
0.4+1=1.4
4.5(1.4)=6.3
The answer is $6.30
B is the correct answer
good luck
