Answer: The final position is 5 feet below the back of the truck Step-by-step explanation: * Lets explain how to solve the problem - A crane lifts a pallet of concrete blocks 8 feet from the back of a truck - The crane lowers the pallet 13 feet after the truck drives away - Assume that the zero level of the position of the ballet of concrete blocks is the back of the truck ∵ The crane lifts the pallet of concrete blocks 8 feet from the back of the truck - That means it take the pallet from zero to 8 ∴ The height of the pallet of concrete blocks is 8 feet over the starting position ∵ The crane lowers the pallet of concrete blocks 13 feet - That means the crane lower the pallet from the height 8 and lift it down 13 feet, so we must to take out from the 8 feet the 13 feet to find the final position of the pallet of concrete blocks ∴ The pallet position is ⇒ 8 - 13 = -5 ∴ The position of the pallet of concrete blocks is 5 feet below the starting position which is the back of the truck * The final position is 5 feet below the back of the truck
