SOLUTION: A sphere with a 4 in. radius is being plated with silver for a cost of $30. To the nearest hundredth what is the radius of a sphere which is plated with silver for a cost of $80?

Question 835462: A sphere with a 4 in. radius is being plated with silver for a cost of $30. To the nearest hundredth what is the radius of a sphere which is plated with silver for a cost of $80?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
The surface area of a sphere is

The cost for that sphere plating is $30.
So the cost per square inch is
Now for an $80 job,

Use your calculator to get that to the desired decimal places.
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