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Vladimir [108]
3 years ago
8

What????????????????????

Mathematics
1 answer:
love history [14]3 years ago
3 0
331-7=6x is the right one which is the right one
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Find the perimeter of the figure below. <br><br> A) 42.1<br> B) 74.0<br> C) 84.2<br> D) 94.4
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The answer is C 84.2
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The answer is at 7:12 a.m, did you get that?


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Using Newton's Law of Cooling. You are a medical examiner called to an abandoned house in which a dead body has been discovered.
Artyom0805 [142]
A) The differential equation comes from the fact that the rate of temperature change is proportional to the difference in temperatures.
\frac{dT}{dt} = \alpha(T -52)

B) Find general solution by separating variables and integrating\int\frac{dT}{T-52} = \alpha \int dt   \\  ln (T-52) = \alpha t + C  \\  T = C e^{\alpha t} +52:


C) Initial condition is t=0, T = 87
87 = C +52 \\  C = 35

D) Total time elapsed is 10 minutes, new temperature is 84
84 = 35 e^{10\alpha} +52
solve for alpha
e^{10\alpha} =\frac{32}{35}  \\  \alpha = \frac{ln(32/35)}{10} \\  \alpha = -.00896

E) Temperature function is:
T = 35 e^{-.00896 t} +52
solving for t
t = \frac{ln (\frac{T-52}{35})}{-.00896}
Plug in T = 98.6
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This is approximately 32 minutes before he arrived or about 1:20 AM
3 0
3 years ago
Will mark brainliest
Simora [160]

Answer:

b

Step-by-step explanation:

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