Final answer:
To find the possible values of ZU, we can use the trigonometric function, Tan, to relate it to the given values of U and t. By substituting the given values into the formula, we can solve for ZU. The approximate value of ZU is obtained by calculating the inverse Tan of the ratio of U and t.
Step-by-step explanation:
To find the possible values of ZU, we first need to find the value of ZU in terms of ZT, U, and t using the Trigonometric Function- Tan: Tan(ZU) = U / t. Substituting the given values, we have Tan(ZU) = 1.4 cm / 8.9 cm. Using the inverse function, we can find ZU: ZU = Tan-1(1.4 cm / 8.9 cm). Calculating the value, we get ZU ≈ 8.93° (rounded to the nearest 10th of a degree).