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8. In mathematics, a formula is a(n)
A. procedure for calculating area and perimeter.
B. expression of the value of the quantity.
C. equation with three or more unknown quantitie
D. rule for finding an unknown quantity.
Answer (2)
Analyze each option to determine the most accurate definition of a formula.
Option A is too specific, option B is vague, and option C is incorrect.
Option D, "rule for finding an unknown quantity," is the most accurate.
The correct answer is D .
Explanation
Analyzing the Options We need to identify the correct definition of a formula in mathematics from the given options. Let's analyze each option:
Option A: A procedure for calculating area and perimeter. This is too specific. Formulas are not limited to area and perimeter calculations.
Option B: Expression of the value of the quantity. This is vague and doesn't fully capture the essence of a formula as a rule or relationship.
Option C: Equation with three or more unknown quantities. This is incorrect. A formula can have any number of unknowns, or even none.
Option D: Rule for finding an unknown quantity. This is the most accurate and general description of a formula.
Selecting the Correct Answer Based on the analysis, option D, "rule for finding an unknown quantity," is the most accurate and general definition of a formula in mathematics.
Final Answer Therefore, the correct answer is D.
Examples
Formulas are used in various fields, such as physics, engineering, and economics, to describe relationships between different quantities. For example, in physics, the formula F = ma (Newton's second law) relates force (F), mass (m), and acceleration (a). In finance, the formula for simple interest, I = PRT , relates interest (I), principal (P), rate (R), and time (T). These formulas provide a clear and concise way to calculate unknown quantities based on known values.
A formula in mathematics is best defined as a 'rule for finding an unknown quantity', which is option D. This description encompasses the broader use of formulas beyond just specific calculations. Therefore, the correct answer is D.
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