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Andru [333]
3 years ago
5

Calculate the shaded areas for c and d

Mathematics
1 answer:
KiRa [710]3 years ago
5 0
C)
Area of full triangle
1/2(8)(6)=24cm^2
Area of non shaded triangle
1/2(4)(3)=6cm^2
Area of full minus area of small triangle
24-6=18cm^2

D)
Area of Big rectangle
(4)(12)=48
Area of non shaded triangle
1/2(9)(4)=18
Area of Big rectangle minus non shaded triangle
48-18=30cm^2
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Answer: It will take 4 seconds  for the rock to hit the​ water.

Step-by-step explanation:

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Since t cannot be negative , so t= 4

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