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Contact [7]
3 years ago
15

Find the time required for an object to cool from 280°F to 220°F by evaluating the following where t is time in minutes. (Round

your answer to four decimal places.) *280 t= 10 In 2 1 dT T – 100 min​

Mathematics
1 answer:
blsea [12.9K]3 years ago
4 0

9514 1404 393

Answer:

  5.8496 min

Step-by-step explanation:

  \displaystyle t=\frac{10}{\ln{2}}\int_{220}^{280}{\frac{1}{T-100}}\,dT=\frac{10(\ln{(280-100)}-\ln{(220-100)})}{\ln{2}}=\frac{10\ln{(3/2)}}{\ln{2}}\\\\\boxed{t\approx5.8496\quad\text{min}}

__

Modern calculators can perform integration with high accuracy. This one gives the same result.

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Pls help! due tonight! Will give brainliest! And pls explain! 16 points!
iris [78.8K]
First of all, x =-1 (y don’t change) so first 2 answer is out.
Now mirror to x-1 >>>
A(0,-1)
0 >> -1 is left one step so -1 left one step is -2
A(0,-1) >> A’(-2,-1)

A(-5,0)
-5 >> -1 is right 4 step so -1 right 4 step is 3
A’(3,0)
This is correct
Answer is D

You can see explain here:
https://youtu.be/Zro30Ui9FXs
8 0
3 years ago
HELPPPP
Shalnov [3]

y = 0.25x + 40

60 = 0.25x + 40

60 - 40 = 0.25x + 40 - 40

20 = 0.25x

\frac{20}{0.25}  =  \frac{0.25x}{0.25}

80 = x

She can buy a maximum of 80 cups.

5 0
3 years ago
Subtract.
V125BC [204]
The answer is 37 20/21 hope this helps :)
5 0
3 years ago
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Alex
Slope(m) = -2 hope this helps
8 0
3 years ago
During the great recession that began in January 2008, average weekly claims for unemployment were 420,000. The normal weekly av
Naya [18.7K]

Average weekly claims for unemployment were 420,000.

The normal weekly average during full employment is 122,000.

To find how many more people we subtract normal weekly average during full employment from average weekly for unemployment

Number of people = 420,000 - 122,000 = 298,000

This is the number of people in a week. Hence, in order to find the number of people in the January month, we have to divide this number by 7 and then multiply by 31.

Because when we divide it by 7, it will give the number of people in 1 day and when multiplied by 31, it will give the number of people in the January month.

Thus, number of more people were filing for unemployment in January 2008 is given by

\frac{ 298,000}{7}\cdot 31\\ \\ =1319714

8 0
4 years ago
Read 2 more answers
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