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soldier1979 [14.2K]
3 years ago
14

Mr mistry has 3 grandchildren. He gives Nimisha £m. He gives Sunhil £80 less than Nimisha. He gives Akshay twice as much as Sunh

il.
Mathematics
2 answers:
slamgirl [31]3 years ago
7 0
Here are the variables.

M= nimisha money

S= Sunhil money

A= Akshay money

The expression is S= M-80
A= S*2
M=S+80

Hope this helped

Luba_88 [7]3 years ago
4 0
Nimisha gets m
sunhil gets 80 less then nimisha....so she gets m - 80
Akshay gets twice as much as Sunhil....so she gets 2(m - 80) = 2m - 160

so the total amount of money given is : m + m - 80 + 2m - 160 = 
4m - 240 <==
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Answer:

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r = 1.692 mm @ t = 10

Step-by-step explanation:

The solution to the first order ordinary differential equation:

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Using Euler's method

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Where initial droplet volume is:

V(0) = \frac{4pi}{3} * r(0)^3 =  \frac{4pi}{3} * 2.5^3 = 65.45 mm^3

Hence, the iterative solution will be as next:

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V'_{i}  = -k *4pi*(\frac{3*65.45}{4pi})^(2/3)  = -6.283\\V_{i+1} = 65.45-6.283*0.25 = 63.88

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V'_{i}  = -k *4pi*(\frac{3*63.88}{4pi})^(2/3)  = -6.182\\V_{i+1} = 63.88-6.182*0.25 = 62.33

  • i = 3, ti = 1, Vi = 62.33

V'_{i}  = -k *4pi*(\frac{3*62.33}{4pi})^(2/3)  = -6.082\\V_{i+1} = 62.33-6.082*0.25 = 60.813

We compute the next iterations in MATLAB (see attachment)

Volume @ t = 10 is = 20.2969

The droplet radius at t=10 mins

r(10) = (\frac{3*20.2969}{4pi})^(2/3) = 1.692 mm\\

The average change of droplet radius with time is:

Δr/Δt = \frac{r(10) - r(0)}{10-0} = \frac{1.692 - 2.5}{10} = -0.0808 mm/min

The value of the evaporation rate is close the value of k = 0.08 mm/min

Hence, the results are accurate and consistent!

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3 years ago
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anzhelika [568]

Answer:

The constants are -15 and 9

Step-by-step explanation:

Constants are those numerical values that will never change, despite the value of x. The easiest way to find them are by finding those numbers that are not affecting x in any way.

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3 years ago
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Answer:

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Step-by-step explanation:

Given:

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Answer:

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TO find:

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Solution:

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