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3 years ago

11

Mrs. Johnson put a fence around the basil. If she fence is 2 ft from the edge of the garden on each side, what is the perimeter

of the fence in feet?

2 answers:

Vadim26 [7]3 years ago

7 0

The perimeter of the fence is 23 1/2 ft

natka813 [3]3 years ago

6 0

The perimeter would be 8ft because 2+2+2+2= 8

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Step-by-step explanation:

using a graphing tool

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Read 2 more answers

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Alexeev081 [22]

Use Law of Cooling:
$T(t) = (T_0 - T_A)e^{-kt} +T_A$
T0 = initial temperature, TA = ambient or final temperature

First solve for k using given info, T(3) = 42
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Substituting k back into cooling equation gives:
$T(t) = 60(\frac{11}{30})^{t/3} + 20$

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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Solve for x:
$x = -9(\frac{11}{30})^{\frac{t-10}{3}} + 80$
Sub back into original cooling equation, x = T(t)
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Solve for t:
$60 (\frac{11}{30})^{t/3} +9(\frac{11}{30})^{\frac{-10}{3}}(\frac{11}{30})^{t/3} = 60 \\ \\ (\frac{11}{30})^{t/3} = \frac{60}{60+9(\frac{11}{30})^{\frac{-10}{3}}} \\ \\ \\ t = 3(\frac{ln(\frac{60}{60+9(\frac{11}{30})^{\frac{-10}{3}}})}{ln (\frac{11}{30})}) \\ \\ \\ t = 4.959$

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