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Slav-nsk [51]
3 years ago
6

Help!!!!!! I’ve been working on this for 1 hour

Mathematics
1 answer:
kifflom [539]3 years ago
5 0

Answer:

7.83

Step-by-step explanation:

cos(40)=6/(ZX)

zx=7.83

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Use Law of Cooling:
T(t) = (T_0 - T_A)e^{-kt} +T_A
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First solve for k using given info, T(3) = 42
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Substituting k back into cooling equation gives:
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At some time "t", it is brought back inside at temperature "x".
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The new cooling equation for when its back inside is:
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x = -9(\frac{11}{30})^{\frac{t-10}{3}} + 80
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