High School

The function below allows you to convert degrees Celsius to degrees Fahrenheit. Use this function to convert 20 degrees Celsius to degrees Fahrenheit.

\[ F(c)=\frac{9}{5} c+32 \]

\[ 20^{\circ}C = \]

A. 20
B. 68
C. 36
D. 94

Answer :

To convert 20 degrees Celsius to degrees Fahrenheit using the given function [tex]\( F(c) = \frac{9}{5} c + 32 \)[/tex], let's follow the steps:

1. Identify the given value in degrees Celsius:
- [tex]\( c = 20 \)[/tex]

2. Substitute [tex]\( c = 20 \)[/tex] into the conversion formula [tex]\( F(c) \)[/tex]:
[tex]\[
F(20) = \frac{9}{5} \times 20 + 32
\][/tex]

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

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

Therefore, 20 degrees Celsius is equal to 68 degrees Fahrenheit.

So the correct answer is:
B. 68

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