Answer: 15 feet.
Explanation:
To find the height of the actual sailboat, we need to determine the ratio of the scale used to build the model. In this case, the ratio is 2 inches : 3 feet, which can be simplified to 1 inch : 1.5 feet.
We can then use this ratio to convert the height of the model, which is 10 inches, to the corresponding height of the actual sailboat. To do this, we multiply the height of the model by the conversion factor, which is 1.5 feet/inch:
10 inches * 1.5 feet/inch = 15 feet