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 Fahrenheit and [tex]\( C \)[/tex] is the temperature in Celsius.

Given:
[tex]\[
F = 57^{\circ} F
\][/tex]

Substituting [tex]\( F = 57 \)[/tex] into the formula, we have:

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

First, calculate the difference inside the parentheses:

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

Next, multiply the result by [tex]\(\frac{5}{9}\)[/tex]:

[tex]\[
C = \frac{5}{9} \times 25
\][/tex]

So,

[tex]\[
C = \frac{125}{9}
\][/tex]

Dividing 125 by 9:

[tex]\[
C \approx 13.88888888888889
\][/tex]

The temperature in Celsius is approximately [tex]\( 13.89^{\circ} C \)[/tex].

To find the temperature rounded to the nearest whole number, we consider the decimal part (0.88888888888889). Since it is greater than 0.5, we round up.

Thus, [tex]\( 13.89^{\circ} C \)[/tex] rounded to the nearest whole number is:

[tex]\[
14^{\circ} C
\][/tex]

So, the temperature in [tex]\( {}^{\circ} C \)[/tex] is [tex]\( 14 \)[/tex]. The correct answer from the given choices is:

[tex]\[
14
\][/tex]