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Mandarinka [93]

3 years ago

14

A duck's mass at birth was 0.05 kilogram. The duck gained approximately 0.042 kilogram each week. After how many weeks is the du

ck's mass 0.890 kilogram?

2 answers:

N76 [4]3 years ago

7 0

0.890-0.05 = .840
.840/ 0.042 = 20
20 weeks

SashulF [63]3 years ago

4 0

21 weeks, I believe.

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Step-by-step explanation:

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3 years ago

What is the Laplace Transform of 7t^3 using the definition (and not the shortcut method)

Leokris [45]

Answer:

Step-by-step explanation:

By definition of Laplace transform we have

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Again repeating the same procedure we get

$=0-\int_{0}^{\infty }\frac{3t^{2}}{-s}e^{-st}dt\\\\=\int_{0}^{\infty }\frac{3t^{2}}{s}e^{-st}dt\\\\\int_{0}^{\infty }\frac{3t^{2}}{s}e^{-st}dt= \frac{3}{s}[t^2\int e^{-st} ]_{0}^{\infty}-\int_{0}^{\infty }[(t^2)\int e^{-st}dt]dt\\\\=\frac{3}{s}[0-\int_{0}^{\infty }\frac{2t^{1}}{-s}e^{-st}dt]\\\\=\frac{3\times 2}{s^{2}}[\int_{0}^{\infty }te^{-st}dt]\\\\$

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3 years ago

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Minchanka [31]

100 degrees I think....

I’m writing this because it said it was too short

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3 years ago

Read 2 more answers