Math
The layer of gold coating on a ring should be 0.03 millimeters thick when the ring is completed. A coating of 0.021 millimeters has already been applied. How many more millimeters of gold coating must be added to finish the ring?
A. 0.18 millimeters
B. 0.09 millimeters
C. 0.009 millimeters
D. 0.018 millimeters
I believe it is either C or B. But strongly leading towards B
If I'm wrong please elaborate how to correct my problem
asked by
Jocelynn

B is not correct.
0.030
0.021
________
posted by Ms. Sue

So C?
posted by Jocelynn

Why do you think it's c? Did you do the subtraction?
0.030
.021
________
posted by Ms. Sue

yes i got 0.009?
posted by Jocelynn

Yes. C is the answer.
:)
posted by Ms. Sue
Respond to this Question
Similar Questions

Math
A waffle cone has a width of 7.6 cm and height of 15.2cm and a chocolate coating that is 2mm thick. What is the volume of the chocolate coating? How many of these cones if they were filled up to the brim would be needed for 400 
human resources, (compensation and benefits)
1. What factors determine the relevant market for a survey? 2. you own Flazer's Tool Coating Company, a hightech firm specializing in the coating of cutting tools to provide longer life before resharpening is needed. you are 
Chemistry
An electrolytic tincoating process gives the coating 30 millionths of an inch thick. How many square meters can be coated with one kilogram, density 7.30 g/cm^3? 
mathlight
An object 5 millimeters high is located 15 millimeters in front of a plane mirror. How far from the mirror is the image located? A. 5.0 millimeters B. 7.5 millimeters C. 15 millimeters D. 30 millimeters 
science
1. An object 5 millimeters high is located 15 millimeters in front of a plane mirror. How far from the mirror is the image located? A. 5.0 millimeters B. 7.5 millimeters C. 15 millimeters D. 30 millimeters 
algebra
A rectangular prism has a volume of 750 cubic millimeters. Its length is 15 millimeters, and its width is 10 millimeters. What is its height 
Physics
A nonreflecting single layer of a lens coating is to be deposited on a lens of refractive index n = 1.7. Determine the refractive index of a coating material and the thickness required to produce zero reflection for light of 
Math
In a study of 800 men,diastolic blood pressure was found to be approximately normally distributed, with a mean of 84 millimeters (mm) of mercury and standard deviation of 10 millimeters. Use the 689599.7% rule to determine what 
Calculus
A wizard with a long beard and bright, flaming eyes places a table in front of you. On the table are two circular rings resembling frisbees. The wizard motions to the table. "We call them Galadriel rings after the great elf of 
Chemistry
Can anyone help and check my answers? A. 8.43 cm to millimeters 84.3 millimeters. B. 2.41x10^2 cm to meterss 0.0241 meters. C. 294.5 nm to centimeters I don't know how to concert this. D. 1.445x10^4 m to kilometers