12. If a thermometer indicates 30 degrees Celsius, what's the temperature in degrees Fahrenheit?

A. [tex]$17^{\circ} F$[/tex]

B. [tex]$86^{\circ} F$[/tex]

C. [tex]$24^{\circ} F$[/tex]

D. [tex]$54^{\circ} F$[/tex]



Answer :

To convert a temperature from degrees Celsius to degrees Fahrenheit, you can use the following formula:

[tex]\[ \text{Temperature in Fahrenheit} = \left(\text{Temperature in Celsius} \times \frac{9}{5}\right) + 32 \][/tex]

Given the temperature in Celsius is 30 degrees, follow these steps to find the temperature in Fahrenheit:

1. Multiply the Celsius temperature by [tex]\(\frac{9}{5}\)[/tex]:
[tex]\[ 30 \times \frac{9}{5} = 30 \times 1.8 = 54 \][/tex]

2. Add 32 to the result from the first step:
[tex]\[ 54 + 32 = 86 \][/tex]

Thus, the temperature in degrees Fahrenheit is [tex]\( 86^{\circ} F \)[/tex].

Therefore, the correct answer is:
B. [tex]\( 86^{\circ} F \)[/tex]