The unknown digit is 7 because 6.471 is greater than 6.470 and less than 6.48.
63/84 divided by 21/21
=3/4
or
63 divided by 84=0.75 which is the same thing as 3/4
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Thats what you would use, so now 2/10 is .2 When you divide so you move the decimal so 20%
The percent increase is 20%
Answer:
area of larger circle : 9π = 28.27
area of smaller circle: 4π = 12.57
area of shaded region: 15.71
Step-by-step explanation:
area of a circle = πr^2
I think these are right i dont know tho