Solve for the variable given the surface area S of the right prism or right cylinder. Round the result to one decimal place. 15. S = 208 m² 8 m x 4 m = 92 m² cm

A copper casting is in the shape of a prism with an equilateral triangle base. The length of each base side is 17.80 centimeters, and the casting height is 16.23 centimeters. Copper weighs 8.8 grams per cubic centimeter. Determine the weight of the casting in kilograms. One kilogram equals 1000 grams. Round the answer to 2 decimal places.