document.write( "Question 294520: If Jose used 4 gallons of wood sealant to cover the hemispherical ceiling of his vacation home, how many gallons of wood sealant are needed to cover the floor? \n" ); document.write( "
Algebra.Com's Answer #212351 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! The surface area of a sphere is 4pi*r^2. \n" ); document.write( "A hemisphere is 2 pi*r^2 \n" ); document.write( "Assuming the floor beneath is round and the same size, it's area it pi*r^2. \n" ); document.write( "It's 1/2 the area, so 2 gallons. \n" ); document.write( " \n" ); document.write( " |