Posted by Chris on Sunday, October 25, 2009 at 9:25pm.
A spherical tree ornament is to be painted in bright colors. If the ornament has a diameter of 4 cm,
how much paint is needed?

Math  bobpursley, Sunday, October 25, 2009 at 9:27pm
Wouldn't it depend on how well the paint covers area?

Math  michael, Monday, October 26, 2009 at 12:48am
The amount of paint you need is the exact same amount of area the ornament has.
The problem tells you that the ornament is a sphere, so the formula for area is
A = &pid^{2}
since we know d=4cm them we have
A = &pi*(4cm)^{2}
A=16cm^{2}
Since A = the amount of paint we found the answer 16cm^{2}

Math  PsyDAG, Monday, October 26, 2009 at 9:37am
In contrast to michael's post, the formula for the surface area of a square is actually
A = 4 (pi)* r^2
Since the diameter is 4, the radius = 2, so
A = 4 (pi) * 4 = 16 (pi) = 16 (3.1416) = ?
I hope this helps a little more. Thanks for asking.
Answer This Question
Related Questions
 math  A spherical tree ornament is to be painted in bright colors. If the ...
 math  A spherical tree ornament is to be painted in bright colors. If the ...
 MATH 157  A spherical tree ornament is to be painted in bright colors. If the ...
 science  A reflecting spherical Christmas tree ornament has a diameter of 12 cm...
 science  A reflecting spherical Christmas tree ornament has a diameter of 12 cm...
 physics  A spherical Christmas tree ornament is 5.34 cm in diameter. What is ...
 Claflin  A reflecting, spherical Christmas tree ornament has a diameter of 8.0 ...
 physics  A child looks at his reflection in a spherical tree ornament 12.0 cm ...
 physics  A girl sees her image in a shiny glass sphere tree ornament that has a...
 physics  A child looks at his reflection in a spherical tree ornament 12 cm in ...
More Related Questions