To find the number of bacteria after 5.5 hours, we need to substitute \( h = 5.5 \) into the function \( B(h) = 82(1.25)^h \).
So we calculate:
\[ B(5.5) = 82(1.25)^{5.5} \]
First, calculate \( (1.25)^{5.5} \):
\[ (1.25)^{5.5} \approx 2.953 \]
Now, substitute this value back into the equation:
\[ B(5.5) \approx 82 \times 2.953 \approx 242.086 \]
Rounding to the nearest bacteria gives us:
\[ B(5.5) \approx 242 \]
Thus, the estimated number of bacteria after 5.5 hours is 242.