The student used the wrong trig ratio. They should use cosine instead.

If the student wanted to use sine, then they would need to use the pythagorean theorem to find the opposite side first. I recommend using cosine since it's faster. Make sure your calculator is in degree mode.
Answer:
x<3
Step-by-step explanation:
-9.5x-1.5>-30
move the constant to the right
-9.5x>-28.5
divide both sides to get x<3
Answer:
$447
Step-by-step explanation:
2,235 multiplied by .20
Answer:
False
Step-by-step explanation:
If we have a factor then the remainder after the division will be zero.