All triangles add up to 180 degrees. Since sines can't be a negative, you need to add -130 to 180. The answer to this question would be sine 50 degrees.
-9 because a negative plus a negative is a negative so -5+-4 or -5-4 is -9
Equation = y = 9800 * 1.02^x
y = 9800 * 1.02^7 = 11257
Answer is 2nd choice
