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#
Convert 21.4 °C into °F.

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Question:

A
70.52 °F

explanation

Step 1: Determine Which Formula to Use

Since we are given Celsius and are solving for Fahrenheit we will use the following formula:

(°C × 1.8) + 32 = °F

This formula shows that we got degrees Celsius and we are solving for degrees Fahrenheit.

Step 2: Substitute In Our Temperature

We are going to use the formula from Step 1, but insert the temperature we were given from our problem, in this case, 21.4 °C.

(21.4 °C × 1.8) + 32 = °F

Step 3: Solve Using Order of Operations

In going through PEMDAS, the order of operations, we first do what happens within the parentheses which is:

(21.4 °C × 1.8)

So this is what happens:

(21.4 °C × 1.8) + 32 = °F

Becomes:

38.52 + 32 = °F

We could drop the parentheses since we completed whatever was inside of them.

Now we can solve the problem.

38.52 + 32 = °F

Which becomes:

70.52 = °F

70.52 °F

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