Final answer:
The weight of the copper piece is 1508.7 lb and the weight of the aluminum piece is 456.3 lb. By using aluminum instead of copper, a weight of 1052.4 lb is saved.
Step-by-step explanation:
To find the weight of a piece made of copper, we need to use the formula:
Weight = Volume * Density
Given that the volume is 2.7 ft³ and the density of copper is 559 lb/ft³, we can calculate the weight as:
Weight = 2.7 ft³ * 559 lb/ft³ = 1508.7 lb
For the aluminum piece, we can use the same formula with the density of aluminum being 169 lb/ft³:
Weight = 2.7 ft³ * 169 lb/ft³ = 456.3 lb
To determine the weight saved by using aluminum instead of copper, we can subtract the weight of the aluminum piece from the weight of the copper piece:
Weight saved = Weight of copper - Weight of aluminum = 1508.7 lb - 456.3 lb = 1052.4 lb