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Ilya [14]
3 years ago
5

I need help with this algebra question

Mathematics
1 answer:
telo118 [61]3 years ago
8 0
The first answer
f(x)= (x-3)^2 + 4
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the first graph

Step-by-step explanation:

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Please help this question.
sergejj [24]

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a). 59.049°C

b). 2.1179 seconds

Step-by-step explanation:

Expression representing the final temperature after decrease in temperature of the metal from 100°C to T°C is,

T = 100(0.9)^{x}

where x = duration of cooling

a). Temperature when x = 5 seconds

T = 100(0.9)⁵

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b). If the temperature of the metal decreases from 100°C to 80°C

Which means for T = 80°C we have to calculate the duration of cooling 'x' seconds

80 = 100(0.9)^{x}

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log(0.8) =log[(0.9)^{x}]

-0.09691 = x[log(0.9)]

-0.09691 = -0.045757x

x = \frac{0.09691}{0.045757}

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QUESTION IS IN PICTURE, FIRST GETS BRAINLIEST
Irina18 [472]

Answer:

48

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3 years ago
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