In triangle abc .m/a=35 ,m/b=65 , and c=15. find b. round your answer to the nearest tenth. a. 13.8 b. 9.5 c. 8.7 d. 23.7

You would use the Law of Sines here.  First realize that if A and B equal 35 and 65 respectively, C=180-65-35=80°.  Then from the Law of Sines:

b/sin65=15/sin80

b=15sin65/sin80

b≈13.8 units (to the nearest tenth of a unit)

I’m not absolutely sure but i think it’s 7x6x5x4x3x2=5040 because as the first character you can take any of the 7 given then you are left with 5 then 6 then 4 etc.