For your first question about the speed of an object at rest, the correct answer is:
c. 0.0 m/s
An object that is at rest has a speed of zero.
For your second question regarding how far a dolphin swims, we can use the formula \( d = v \times t \).
Given:
- \( v = 1.85 \) km/h
- \( t = 0.60 \) h
Calculating the distance:
\[ d = 1.85 , \text{km/h} \times 0.60 , \text{h} = 1.11 , \text{km} \]
This would round to about 1.1 km, so the correct answer is:
d. 1.1 km
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