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n200080 [17]
3 years ago
12

Can you also please explain, I need this done very fast

Mathematics
1 answer:
miv72 [106K]3 years ago
6 0
15) a) -3 and -4

-3(-4) = 12 (two negative numbers multiplied or divided together = positive answer)

      b) -5 and 6
6(-5) = -30 (one negative number and one positive number multiplied together = negative answer)
-5 + 6 = 1


16) 2.4 kg, 0.7 kg
c) a loss of 15kg should be your answer, because the loss has a larger number proportion than the gained


hope this helps
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Answer:

Step-by-step explanation:

Use Newton's Law of Cooling here:

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53=35+(73-35)^{-35k which can simplify a bit to

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Take the natural log of both sides:

ln(18)=ln(38)^{-35k

Taking the natural log allows us to pull that exponent down out front:

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k = -.023

Now that have the value for k, we can go on to solve the rest of the problem which is asking us the temp of the soda after 70 minutes. Filling in using the k value and the new time of 70 minutes:

T(t)=35+(38)^{70(-.023) and

T(t)=35+(38)^{-1.61 and

T(t)=35+.0028612013 and

T(t) = 35 F, basically the temp of the fridge, which is not surprising!

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3 years ago
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Step-by-step explanation:

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