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8. When the temperature is 20 degrees Celsius (C), what is it on the Fahrenheit (F) scale? Use the formula:

[tex]\[ F = \left(\frac{9}{5} \times C\right) + 32 \][/tex]

A. 62 degrees
B. 68 degrees
C. 78 degrees
D. [tex]\(\frac{933}{5}\)[/tex] degrees

Answer :

Sure, let's find out the temperature in Fahrenheit when the temperature is 20 degrees Celsius using the formula:

[tex]\[ F = \left(\frac{9}{5} \times C\right) + 32 \][/tex]

Step-by-Step Solution:

1. Identify the given temperature in Celsius:
Given: [tex]\( C = 20 \)[/tex] degrees Celsius

2. Substitute the value of [tex]\( C \)[/tex] into the formula:
[tex]\[ F = \left(\frac{9}{5} \times 20\right) + 32 \][/tex]

3. Perform the multiplication:
[tex]\[ \frac{9}{5} \times 20 = 9 \times 4 = 36 \][/tex]
(Since [tex]\( 20 \div 5 = 4 \)[/tex])

4. Add 32 to the result of the multiplication:
[tex]\[ 36 + 32 = 68 \][/tex]

Therefore, the temperature in Fahrenheit is [tex]\( 68 \)[/tex] degrees.

So, the correct answer is:
[tex]\[ \boxed{68 \text{ degrees}} \][/tex]

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