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May 15th, 2017, 12:49 AM  #1 
Newbie Joined: May 2017 From: UK Posts: 2 Thanks: 0  Differentiating equation
I've been given a test paper for next years math class and it looks way over my head. One of the questions is  p = ae^bh (equation one) Where p is pressure at height h. a and b are constants with values a = 101325 Pa and b = 1.185 x10^4 m^1 Differentiate equation one with respect to h and give values for the rate of change of pressure with height at a height of 4.0 x10^3 and 8.0 x10^3 Is anyone able to give me a worked answer to this question so I can see how it is done? 
May 15th, 2017, 12:57 AM  #2 
Senior Member Joined: Sep 2015 From: Southern California, USA Posts: 1,600 Thanks: 816 
$p = a e^{b h}$ $\dfrac{dp}{dh} = ab e^{bh}$ now just plug your numbers in for $a,~b,~h$ 

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