Questions: 12.34 A + 12.3 mA = Ex: 3.456 Select

12.34 A + 12.3 mA = Ex: 3.456 Select
Transcript text: CHALLENGE Activity 1.2.2: Math with engineering prefixed numbers. \[ 12.34 \mathrm{~A}+12.3 \mathrm{~mA}=\begin{array}{|l|l|} \hline \text { Ex: } 3.456 & \text { Select } ~ \\ \hline \end{array} \]
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Solution

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Solution Steps

Step 1: Convert milliamperes (mA) to amperes (A)

Convert \(12.3 \, \text{mA}\) to amperes by dividing by \(1000\): \[ 12.3 \, \text{mA} = \frac{12.3}{1000} \, \text{A} = 0.0123 \, \text{A}. \]

Step 2: Add the two values in amperes

Add \(12.34 \, \text{A}\) and \(0.0123 \, \text{A}\): \[ 12.34 \, \text{A} + 0.0123 \, \text{A} = 12.3523 \, \text{A}. \]

Step 3: Round the result to the appropriate number of significant figures

The original values have \(4\) and \(3\) significant figures, respectively. Round the result to \(4\) significant figures: \[ 12.3523 \, \text{A} \approx 12.35 \, \text{A}. \]

Final Answer

\(\boxed{12.35 \, \text{A}}\)

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