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To use an area model to find the product of 423 x 9, you would draw a rectangle and divide it into three sections representing the digits of 423. Then, you would draw nine smaller rectangles within each section, representing the digits of 9. Finally, you would calculate the product of each pair of numbers in the corresponding sections and add them up to get the final product.
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A mathematical model is a description of a scientific system using math.The scientists created a mathematical model to explain the process.We studied the mathematical model.
It is use full because they can all be map on to different members
We use the dot product cos and in vector we use the vector product sin because of the trigonometric triangle.