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vlabodo [156]
2 years ago
15

Answer number 8 please. Thank you.

Mathematics
2 answers:
Alekssandra [29.7K]2 years ago
5 0
A triangle has to add up to 180 so it’s C that’s wrong
nataly862011 [7]2 years ago
3 0

Answer:

The answer is C. A triangle has a total angle of 180°, therefore C. is more than 180°

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2500 students are computer science majors
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The dimensions of a rectangle are 3 cm by 5
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9 or 12 I think Possibly 18
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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
Tju [1.3M]

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

Temperature after (t = 3 minutes) = 90°C

Now,

using the given equation

T=60+40e^{kt}

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90=60+40e^{k(3)}

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or

e^{3k}=\frac{3}{4}

taking the natural log both sides, we get

3k = \ln(\frac{3}{4})

or

3k = -0.2876

or

k = -0.09589

Therefore,

substituting k in 1 for time at temperature, T = 65°C

65=60+40e^{( -0.09589)t}

or

5=40e^{( -0.09589)t}

or

e^{( -0.09589)t}=\frac{5}{40}

or

e^{( -0.09589)t}=0.125

taking the natural log both the sides, we get

( -0.09589)t = ln(0.125)

or

( -0.09589)t = -2.0794

or

t = 21.68 minutes ≈ 21.7 minutes

6 0
3 years ago
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Answer:

y=-1/8y+1

Step-by-step explanation:

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y=−8x+8

Step 1: Flip the equation.

−8x+8=y

Step 2: Add -8 to both sides.

−8x+8+−8=y+−8

−8x=y−8

Step 3: Divide both sides by -8.

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DaniilM [7]

Answer:

b 70-79

Step-by-step explanation:

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3 years ago
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