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Marianna [84]
3 years ago
13

Select all that apply.

Mathematics
1 answer:
Firdavs [7]3 years ago
8 0
The point was reflected over the y-axis and translated up 4 units, because when it was reflected over the y-axis, the coordinates became (-5, -2), and after getting translated up 4 units, the coordinates became (-5,2).
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What is Greater 980 squared root or 4π^2
Rudik [331]

Answer:

The greater number is 4π^2.

Step-by-step explanation:

1) 4π^2 = 39.4784176044

2) \sqrt{980} = 31.304951685

4π^2 is greater.

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3 years ago
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Answer:

65%

Step-by-step explanation:

yes i changed it because i don't want to confuse anyone:)

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the temperature of a cup of coffee obeys newton's law of cooling. The initial temperature of the coffee is 150F and 1 minute lat
natka813 [3]

Answer:

Newton's law of cooling says that:

T(t) = Tₐ + (T₀ - Tₐ)*e^(k*t)

or:

\frac{dT}{dt} = -k*(T - T_a)

in the differential form.

where:

T is the temperature as a function of time

Tₐ  is the ambient temperature, in this case, 70F

T₀ is the initial temperature of the object, in this case, 150F

k is a constant, and we want to find the value of k.

Then our equation is:

T = 70F + (150F - 70F)*e^(k*t)

Now we also know that after a minute, or 60 seconds, the temperature was 135F

then:

135F = 70F + (150F - 70F)*e^(k*60s)

We can solve this for k:

135F = 70F + 80F*e^(k*60s)

135F - 70F = 80F*e^(k*60s)

65F =  80F*e^(k*60s)

(65/80) = e^(k*60s)

Now we can apply the Ln(x) function to both sides to get:

Ln(65/80) = Ln(e^(k*60s))

Ln(65/80) = k*60s

Ln(65/80)/60s = k = -0.0035 s^-1

Then the differential equation is:

\frac{dT}{dt} = -0.0035 s^-1*(T - 70F)

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Minchanka [31]
Answer is -4/3
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2 years ago
Rate my handwriting 1/10​
lukranit [14]

Answer:

8/10

Step-by-step explanation:

thanks for the pts

✌️❤️✌️

7 0
2 years ago
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