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Amanda [17]
3 years ago
5

Mhanifa please help with this

Mathematics
1 answer:
Fed [463]3 years ago
8 0

Answer:

<u>Use cross-multiplication to solve these</u>

  • 1) 6/2 = 4/p ⇒ 6p = 4*2 ⇒ p = 8/6 ⇒ p = 4/3
  • 2) 4/k = 8/2 ⇒ 8k = 2*4 ⇒ k = 8/8 ⇒ k = 1
  • 3) n/4 = 8/7 ⇒ n = 4*8/7 ⇒ n = 32/7
  • 4) 5/3 = x/4 ⇒ x = 4*5/3 ⇒ x = 20/3
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Answer:

Step-by-step explanation:

a)area A=pi r^2

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rate of change of area =dA/dt =2 pi *(8/√pi) *25 =400√pi=708.98

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Step-by-step explanation:

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