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Rina8888 [55]
4 years ago
10

suppose the cooking time for a particular recipe varies inversely with the temperature of the oven. if the recipe takes 60 minut

es to cook at a temperature of 350 degrees, how many minutes would it take at 200 degrees
Mathematics
1 answer:
Zielflug [23.3K]4 years ago
4 0

Answer:

It would take 34.29 minutes at 200 degree.

Step-by-step explanation:

Given that,for a particular recipe the cooking time(t) varies inversely with the temperature(T) of the oven.

t∝T

\therefore \frac{t_1}{t_2}=\frac{T_1}{T_2}

The recipe takes 60 minutes to cook at a degree temperature of 350 degree,

t₁= 60 minutes, T₁= 350 degree, t₂=?, T₂=200 degree.

\therefore \frac{t_1}{t_2}=\frac{T_1}{T_2}

\frac{60}{t_2}=\frac{350}{200}

\Rightarrow t_2\times 350=200\times 60

\Rightarrow t_2=\frac{200\times 60}{350}

\Rightarrow t_2\approx 34.29

It would take 34.29 minutes at 200 degree.

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10.

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I have a Triangle and I need to find the side BC?
Rus_ich [418]
Looking at this problem in the book, I'm guessing that you've been
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Do you remember the definition of either the sine or the cosine of an angle ?

In a right triangle, the sine of an acute angle is  (opposite side) / (hypotenuse),
and the cosine of an acute angle is (adjacent side) / (hypotenuse).

Maybe you could use one of these to solve this problem, but first you'd need to
make sure that this is a right triangle.

Let's see . . . all three angles in any triangle always add up to 180 degrees.
We know two of the angles in this triangle ... 39 and 51 degrees.
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It's a right triangle !  yay !  We can use sine or cosine if we want to.

Let's use the 51° angle.
The cosine of any angle is (adjacent side) / (hypotenuse) .
'BC' is the side adjacent to the 51° angle in the picture,
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cosine(51°) = (side BC) / 27

Multiply each side of that equation by 27 :

Side-BC = (27) times cosine(51°)

Look up the cosine of 51° in a book or on your calculator.

Cosine(51°) = 0.62932 (rounded)

<u>Side BC</u> = (27) x (0.62932) = <u>16.992</u> (rounded)
============================================

You could just as easily have used the sine of 39° .
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4 0
4 years ago
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I am Lyosha [343]

Answer:

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Step-by-step explanation:

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