Final answer:
The angle's measure in radians is 0.6 radians.
Step-by-step explanation:
To find the angle's measure in radians, we can use the arc length formula. The arc length is given as 2.4 feet and the radius is given as 4 feet. The formula to find the angle in radians is: θ = s / r, where θ is the angle, s is the arc length, and r is the radius. Plugging in the values: θ = 2.4 / 4 = 0.6 radians. Therefore, the angle's measure is 0.6 radians.