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masha68 [24]
2 years ago
13

(1 point) A cup of coffee at 100 degrees celsius is put into a 30 degree celsius room when t=0. The coffee's temperature, f(t),

is changing at a rate given by f′(t)=−7(0.8)t degrees celsius per minute, where t is in minutes.
Mathematics
1 answer:
Lapatulllka [165]2 years ago
3 0

Answer:your question seems incomplete but if you looking to find the resulting equation to solve for temperature at a particular time you can use this 28t^2

Step-by-step explanation:

F'(t) = 7(0.8)t

Integrating the RHS

Temp= integral of f'(t)= 28t^2

Therefore, T(°c)= 28t^2

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<img src="https://tex.z-dn.net/?f=x%20%2B%20y%20%3D%209%20%2B%202x%20-%203y%20%3D%208" id="TexFormula1" title="x + y = 9 + 2x -
Vadim26 [7]

Answer:

(7,2)

Step-by-step explanation:

x + y = 9 + 2x - 3y = 8 is really two equations, and you should show this by separating x + y = 9 from 2x - 3y = 8 through the use of a comma, or the word "and," or through writing only one equation per line.

Here you have the system of linear equations

 x +   y =  9

2x - 3y = 8.

Let's solve this system by elimination.  Mult. the 1st eqn by 3, obtaining the system

3x + 3y = 27

2x - 3y =    8

-------------------

5x = 35, so that x = 7.  Subbing 7 for x in x + y = 9, we get 7 + y = 9, indicating that y = 2.

Thus, the solution to this system of equations is (7,2).


6 0
2 years ago
A tower casts a shadow that is 60 feet long when the angle of elevation of the sun is 65˚. how tall is the tower?
Mila [183]

Answer:

70 ft i think

Step-by-step explanation:

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2 years ago
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A package of 25 wristbands cost $5.25. At this rate, what is the cost of 1 wristband in dollars and cents?
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Answer:

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Step-by-step explanation:

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6 0
3 years ago
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