Final answer:
To find the real wingspan of Joshua's model airplane, we multiply the model's wingspan by the scale factor. The actual wingspan is 412.5 feet.
Step-by-step explanation:
Joshua is working on a model airplane that has a scale of 1 inch to 25 feet. To find the actual wingspan of the airplane, we need to set up a proportion using the scale. Since the model's wingspan is 16.5 inches, we can set up the proportion as follows:
1 inch (model) : 25 feet (real)
16.5 inches (model) : x feet (real)
To solve for 'x', the actual wingspan, we multiply both sides of the first ratio by 16.5:
16.5 inches * 25 feet/1 inch = 412.5 feet
Therefore, the actual wingspan of the airplane is 412.5 feet.