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Sagot :
Answer:
"The drone is at the surface of the water at both 4 and 7 seconds into the observation."
Have a good day! :>
Answer:
B
Step-by-step explanation:
0 = t^2 - 11t + 28
0 = (t-4) x (t-7)
so it is at the surface at seconds 4, 7
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