Final answer:
The height of the flagpole is 30 feet.
Step-by-step explanation:
To find the height of the flagpole, we can set up a proportion using the given information.
We know that Antonio's height of 6 feet corresponds to an 8-foot shadow, so we can write the proportion as: height of flagpole / shadow of flagpole = height of Antonio / shadow of Antonio.
Plugging in the values, we get: height of flagpole / 40 = 6 / 8.
Cross multiplying and solving for the height of the flagpole gives us:
height of flagpole = (40 * 6) / 8
= 30 feet.