Please take a photo of this problem... it looks very hard when it is written in the way you did.
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If I am reading this correctly the answer should be 1,977,326,743x^3</h3>
A few ways. you can enter it into a calculator for one, but the easiest way would be to reference a unit circle and look for an ordered pair where sin (the y value), is equal to -1/2
on a unit circle, the sin value is -1/2 at 7pi/6 and 11pi/6
because sin is the y value, it will additionally be in the quadrants III or IV based on the fact that (-1/2) as a sin value IS a negative and would have to be found in a quadrant in which sin is negative (the lower half of a coordinate plane, in this case)
.73 x .05= .0365
.733333333 x .0000000555555555= .036555555555
i think this is correct hope this helps
R equals approximately 4/5
B is correct, because there is only 1 output for each input.