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Answers by Carlos D.

Wrong answer.  Sine and inverse sine are  "inverse" functions so they cancel each other...     The answer (either radians or degrees)   is   1.325 Sorry for the correction,   Carlos

We really want to get Briana's amount  so call it B Julia has B/3   and Joseph has   B/3  -12   So alltogether they have 113 = B + B/3 + (B/3  - 12) Breaking the parenthesis and arranging the equation we get  B =  $ 75