$\frac{1}{2}(7.8)(4.3)$
Answer (2)
Multiply 7.8 by 4.3 to get 33.54.
Divide 33.54 by 2.
The result is 16.77.
The final answer is 16.77 .
Explanation
Understanding the expression We are asked to evaluate the expression 2 1 ( 7.8 ) ( 4.3 ) . This involves multiplying the numbers 7.8 and 4.3, and then multiplying the result by 2 1 which is equivalent to dividing by 2.
Multiplying 7.8 and 4.3 First, we multiply 7.8 by 4.3: 7.8 × 4.3 = 33.54
Dividing by 2 Next, we divide the result by 2: 2 33.54 = 16.77
Final Answer Therefore, the value of the expression 2 1 ( 7.8 ) ( 4.3 ) is 16.77.
Examples
In real-world scenarios, this type of calculation can be useful when dealing with areas. For example, if you need to find the area of a triangle with a base of 7.8 meters and a height of 4.3 meters, you would use the formula: Area = 2 1 × ba se × h e i g h t . In this case, it would be 2 1 × 7.8 × 4.3 = 16.77 square meters. This calculation helps in various fields like construction, landscaping, and design where area calculations are frequently needed.
The value of the expression 2 1 ( 7.8 ) ( 4.3 ) is 16.77 after multiplying 7.8 and 4.3 to get 33.54 and then dividing by 2. The calculation helps illustrate how area formulas work, as they often use similar multiplication and division steps.
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