\( \begin{array}{r}15 \mathrm{ft} 9 \text { in. } \\ +17 \mathrm{ft} 3 \mathrm{in} . \\ \hline\end{array} \)

To add these two measurements, let's convert everything to inches for easier addition. First, convert the feet into inches: - \( 15 \text{ ft} = 15 \times 12 = 180 \text{ in} \) - \( 9 \text{ in} = 9 \text{ in} \) - So, \( 15 \text{ ft} 9 \text{ in} = 180 \text{ in} + 9 \text{ in} = 189 \text{ in} \) Now for the second measurement: - \( 17 \text{ ft} = 17 \times 12 = 204 \text{ in} \) - \( 3 \text{ in} = 3 \text{ in} \) - So, \( 17 \text{ ft} 3 \text{ in} = 204 \text{ in} + 3 \text{ in} = 207 \text{ in} \) Now, add both measurements: - \( 189 \text{ in} + 207 \text{ in} = 396 \text{ in} \) Finally, convert inches back to feet and inches: - \( 396 \text{ in} \div 12 = 33 \text{ ft} \quad (\text{with a remainder})\) - \( 396 \text{ in} = 33 \text{ ft} \text{ and } (396 - 396 \div 12 \times 12 = 0) \text{ in} \) So, \( 15 \text{ ft} 9 \text{ in} + 17 \text{ ft} 3 \text{ in} = 33 \text{ ft} 0 \text{ in} \).