Answer:
70 feet currently and he needs to rise 30 feet more to reach the surface
Explanation:
100-30=70 which is how much he's at currently
100-70=30 which is how much he has left
(sorry I took so long to respond lol)
It is in the lowest form already
The way you'd set it up would be sin55º/12=sinB/14 (you could also flip the equation so that 12/sin55º=14/sinB, you'll get the same answer either way). Multiply out so that its 14•sin55º=12•sinB, or 11.47=12•sinB. Divide both sides by 12 so that it looks like .96=sinB, then take arcsine of both sides (arcsin= x=sin^-1 theta+360n or x=180- (sin^-1 theta)+360n), which should give you about 72.88º and 107.12º.
They belong to all of them, but Natural Number is the best option
53,000 or 50,000 depending on how precisely you want to estimate