The final answer of the expression is:
Correct answer: B. 2
- A. 1
- B. 2
- C. 3
- D. 4
Explanation
The following is the solution:In multiplication and division, the final result is limited to numbers containing the least number of significant figures.The least precise terms i.e., 9.0 has only two significant figures. Hence, the final answer will have two significant figures.(29−20.2) It consists of two numbers, 29→ has two significant figures and 20.2→ has three significant figures. The final result of this expression should have Two Significant Figures 1.79 x 10⁵ In scientific notation, the number of significant figures is taken from the non-exponent part of the number. 1.79 has three significant figures. The least of all is 2. So, the final result must be stated in scientific notation with two significant figures
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About Measurements
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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