Final answer:
The storm door is 7/8 inch thick.
Step-by-step explanation:
To find the thickness of the storm door, we need to add the thickness of each component together.
The door consists of two sheets of aluminum, each 1/16 in. thick, and a layer of insulation that is 3/4 in. thick. So, the total thickness is:
2(1/16 in.) + 3/4 in. = 1/8 in. + 3/4 in. = 7/8 in.
Therefore, the door is 7/8 inch thick.