4 years ago

Instructions: Select the correct answer.

2 answers:

6 0

The formula for the area of a circle (in this case, the disc) is
$\pi {r}^{2}$
So, we apply the given radius to the formula to give us our answer:
$\pi \times {7.6}^{2} = 181.4583917$
So, your approximate answer is C.

Nataly [62]4 years ago

3 0

Answer:

the answer would be <em>C</em>

Step-by-step explanation:

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Water whose temperature is at 100∘C is left to cool in a room where the temperature is 60∘C. After 3 minutes, the water temperat

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Answer:

21.68 minutes ≈ 21.7 minutes

Step-by-step explanation:

Given:

$T=60+40e^{kt}$

Initial temperature

T = 100°C

Final temperature = 60°C

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Now,

using the given equation

$T=60+40e^{kt}$

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taking the natural log both sides, we get

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taking the natural log both the sides, we get

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t = 21.68 minutes ≈ 21.7 minutes

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