A person has two times as many nickels as quarters. if the total face value of these coins is $4.55, how many of each type of co
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1. The surface area of a cone S is S= 
, where r is the radius of the base and l is the slant height.
2. The slant height l is found as follows:
3.
4. The answer is C
2. The slant height l is found as follows:
3.
4. The answer is C