18, 23, 24 I think so not sure
Answer:
14.1m above the sea level.
Step-by-step explanation:
h(t)=−4.9t²+4t+15, t in seconds
When t=0s, h(0)=15m (height of cliff), so it means that h is measured from the sea level.
After 1 second: h(1)=-4.9+4+15=14.1m above the sea level.
Answer:
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