Question

part 3 of 4
solve for b. use a calculator if necessary. (round your answer to one decimal place.)
100 + b² = 121
b² = 121 - 100
b² = 21
√b² = √21
b = 4.6

part 4 of 4
therefore, rounded to one decimal place, the length of the unknown side is m.
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Explanation:

Step1: Recall the solved value of \( b \)

From the previous steps, we found that \( b=\sqrt{21}\approx4.6 \) (rounded to one decimal place).

Step2: Determine the length of the unknown side

The unknown side's length is the value of \( b \) we calculated, which is approximately \( 4.6 \) meters.

Answer:

\( 4.6 \)