Find the Missing Length to the Nearest Tenth $b=1.7 \mathrm{~m}$ B) $b=75 \mathrm{~m}$

Find the missing length to the nearest tenth.
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A) $b=1.7 \mathrm{~m}$
B) $b=75 \mathrm{~m}$
C) $b=8.7 \mathrm{~m}$
D) $b=17.8 \mathrm{~m}$