To determine when the rock hits the water, we need to find the time \( t \) when the height \( h \) is equal to 0, which can be found by setting the equation:
\[ h = -4.9t^2 + 10 = 0 \]
Solving for \( t \):
\[ -4.9t^2 + 10 = 0 \]
\[ 4.9t^2 = 10 \]
\[ t^2 = \frac{10}{4.9} \]
\[ t^2 \approx 2.0408 \]
\[ t \approx \sqrt{2.0408} \]
\[ t \approx 1.43 \text{ seconds} \]
To set up a table to determine when the rock hits the water, the reasonable scale for the range would be from \( t = 0 \) seconds to \( t \approx 1.5 \) seconds.
Considering the given responses, the scales that would make sense would allow for decimal increments, so:
- 1 tenth (1, 1.1, 1.2, ..., 1.5) would be reasonable.
Therefore, the best choice for the range scale would be 1 tenth.
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