Should be markdown, but if you have other options let me know and I'll tell you which it is. But if markdown is one of your choices, or if this is fill-in, it's markdown.
Answer: -57
Step-by-step explanation: -48 + (9 - 18) -48 + -9 = -57
The center is (-2,0)
The radius is -3
The amount of gold coating in millimeters needed for the ring is the difference between the total coating and the coating that has already been applied. From the given above, that would be,
0.03 mm - 0.021 mm = 0.009 mm
Thus, the answer to this question is letter B.
