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Marrrta [24]
3 years ago
15

In the two-stage cooling method, what is the maximum amount of time allowed to cool food from 135 degrees F or more to 70 degree

s F or less?
Physics
1 answer:
Tresset [83]3 years ago
5 0
The problem ask to find the maximum amount of time that is allowed to cool food from 135 degree F or more to 70 degree F or less and the allowed time would be that the food would be cool of is around to 4 to 6 hours. I hope you are satisfied with my answer and feel free to ask for more of you have questions and further clarifications 
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The area of a rectangular park is 4 mi^2. The park has a width that is equal to "w", and a length that is 3 mi longer than the w
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Answer:

l= 4 mi   : width of the park

w= 1 mi  : length of the park

Explanation:

Formula to find the area of ​​the rectangle:

A= w*l       Formula(1)

Where,

A is the area of the  rectangle in mi²

w is the  width of the rectangle in mi

l is the  width of the rectangle in mi

Known data

A =  4 mi²

l = (w+3)mi    Equation (1)

Problem development

We replace the data in the formula (1)

A= w*l  

4 = w* (w+3)

4= w²+3w

w²+3w-4= 0

We factor the equation:

We look for two numbers whose sum is 3 and whose multiplication is -4

(w-1)(w+4) = 0 Equation (2)

The values ​​of w for which the equation (2) is zero are:

w = 1 and w = -4

We take the positive value w = 1 because w is a dimension and cannot be negative.

w  = 1 mi  :width of the park

We replace w  = 1 mi  in the equation (1) to calculate the length of the park:

l=  (w+3) mi

l= ( 1+3) mi

l= 4 mi

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