4 years ago

Done8P4_Lessons_for_23 March 20209x + 6y – 2 – 4y + 22

Mathematics

1 answer:

Anon25 [30]4 years ago

8 0

The result is: 9x+2y+20

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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

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Answer:

5.8496 min

Step-by-step explanation:

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

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Step-by-step explanation:

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20:24

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24/4 =6

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Done8P4_Lessons_for_23 March 20209x + 6y – 2 – 4y + 22​

Done8P4_Lessons_for_23 March 20209x + 6y – 2 – 4y + 22