A escala de temperatura conhecida por Escala Fahrenreit é definida com dois pontos fixos, respectivamente, o ponto de fusão do gelo a 32 ºF e o ponto de ebulição da água a 212 ºF.

Let's break down the Fahrenheit scale to find the correct answer. The Fahrenheit scale is defined by two fixed points: the freezing point of water at 32°F and the boiling point of water at 212°F. On the Celsius scale, these points correspond to 0°C and 100°C, respectively.

To find the temperature in Fahrenheit that corresponds to 30°C, we can set up a proportion. Let x be the temperature in Fahrenheit:

$$frac{x-32}{212-32} = frac{30-0}{100-0}$$

Simplifying the equation, we get:

$$x-32 = frac{30}{100}(212-32)$$

$$x-32 = 6 times 18$$

$$x-32 = 108$$

$$x = 108 + 32$$

$$x = 86°F$$

Therefore, the correct answer is E) 86°F.

This problem requires an understanding of the relationship between the Celsius and Fahrenheit scales. By setting up a proportion, we can find the temperature in Fahrenheit that corresponds to a given temperature in Celsius.