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balandron [24]
3 years ago
11

Need help ASAP 20 points

Mathematics
1 answer:
mote1985 [20]3 years ago
3 0

Answer:

It is D.

Step-by-step explanation:

Hoped this helped have an amazing day!

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A cup of coffee with temperature 155degreesF is placed in a freezer with temperature 0degreesF. After 5 ​minutes, the temperatur
Leviafan [203]

Answer:

45.50° F

Step-by-step explanation:

As per Newton's law,

T(t) = T_{s}+(T_{0} + T_{s})e^{-kt}

When T(t) is the final temperature

T_{s} = Temperature of surrounding

T_{0} = Initial temperature

t =duration of cooling

k = constant

103=0+(155-0)e^{-k\times 5}

103=155e^{-5k}

Now take natural log on both the sides

ln(103)=ln(155e^{-5k})

ln(103)=ln(155)+ln(e^{-5k})

ln(103)=ln(155)=-5k

4.6347 - 5.0434 = -5k

k=\frac{0.40872}{5}

k = 0.0817

T(t)=0+(155-0)e^{(0.0817\times 15)}

   = 155e^{-1.226}

   = 155 (02935)

  = 45.49 ≈ 45.50° F

8 0
4 years ago
Help me please people it’s the last question
DochEvi [55]

Answer:

1 m³

Step-by-step explanation:

first find volume of smaller cubes

V = lwh

S = 1/3*1/3*1/3

S = 1/27

find volume of large cube. there are 27 smaller cubes.

V = 27S

V = 27(1/27)

V = 1

S: volume of small cube

V: volume of large cube

6 0
3 years ago
Read 2 more answers
Evaluate the function<br> f(x)= 7.45x + 33.7 at x= -4.3
slavikrds [6]
First, you have to substitute for x, which would make the problem f(x)=7.45(-4.3)+33.7
Now, you just have to use the PEMDAS method (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction)
f(x)= -32.035+33.7
f(x)=1.665
6 0
4 years ago
Please help i will give you brainly!!!!!!
Vitek1552 [10]

Answer:

1. $33.00

2. $48.00

3. $3.00

4. $36.40

Step-by-step explanation:

44.00 - 25% = 33 —> $33.00

80.00 - 40% = 48 —> $48.00

9.99 - 70% = 2.997 —> (round the 7 up because it's above 5) $3.00

52.00 - 30% = 36.4 —> $36.40

6 0
3 years ago
Express sin O as a fraction in simplest terms.
ollegr [7]

To express sin O as a fraction in simplest term is 5/6

<h3>How to determine the expression</h3>

Using the formula:

Sin O = opposite/ hypotenuse

Where opposite = The side directly opposite the angle

hypotenuse = The longest side of the triangle

Sin O = 5 / 6

Therefore, to express sin O as a fraction in simplest term is 5/6

Learn more about the trigonometry here:

brainly.com/question/7331447

#SPJ1

6 0
2 years ago
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