Final answer:
The units of the constants a and b in the given equation are (radians/seconds^2) and (radians/seconds^4), respectively.
Step-by-step explanation:
The given equation is u(t) = at^2 + bt^4, where a = 1.50 and b = 1.10. In order to determine the units of these constants, we need to understand the units of the equation itself. The angle, u(t), is measured in radians, and the time, t, is measured in seconds. Therefore, the units of a and b will depend on the units of the constants multiplied by t. So, the units of a are (radians/seconds^2), and the units of b are (radians/seconds^4).