College

An outside thermometer reads [tex]$57^{\circ} F$[/tex]. What is this temperature in [tex]${ }^{\circ} C$[/tex]? Round your answer to the nearest whole number.

A. 14
B. 49
C. 71
D. 135

Answer :

To convert a temperature from Fahrenheit to Celsius, we use the formula

[tex]$$
C = \frac{5}{9}(F - 32)
$$[/tex]

where [tex]\( F \)[/tex] is the temperature in degrees Fahrenheit.

1. Start with the given temperature:

[tex]$$ F = 57^\circ F $$[/tex]

2. Substitute [tex]\( F = 57 \)[/tex] into the formula:

[tex]$$
C = \frac{5}{9}(57 - 32)
$$[/tex]

3. Compute the difference inside the parentheses:

[tex]$$
57 - 32 = 25
$$[/tex]

4. Multiply by [tex]\( \frac{5}{9} \)[/tex]:

[tex]$$
C = \frac{5}{9} \times 25 = \frac{125}{9} \approx 13.8889
$$[/tex]

5. Round the result to the nearest whole number:

[tex]$$
13.8889 \approx 14
$$[/tex]

Thus, the temperature in Celsius, rounded to the nearest whole number, is

[tex]$$
14^\circ C.
$$[/tex]