**Rounding to 3 Significant Figures Transum**

3. Calculate the answers to the appropriate number of significant figures. Calculate the answers to the appropriate number of significant figures. a) 23.7 x 3.8 = 90.... 11 8 Town Y is 4.6km due West of Town Z. Town X is 2.3km due North of Town Y. Town Y (a) Calculate the size of the angle marked 𝑎. Give your answer correct to three significant figures.

**BBC Bitesize GCSE Physics (Single Science) - Sample exam**

It allows you to give your numbers more or less significant figures. It also outputs standard, scientific, and engineering notation with a specified number of significant figures. In the accepted answer there is …... The 10 has an infinite number of significant figures, so Rule 6 says the answer has four significant figures. Calculate the circumference of a circle with measured radius 2.86 m. Answer: C = 2πr = 2 × π × 2.86 m = 17.97 m. The 2 is exact, and your calculator stores the value of π to many significant figures, so we invoke Rule 3 to obtain a result with four significant figures.

**Mathematics (Calculator Paper) Revision World**

The number of significant digits in an answer to a calculation will depend on the number of significant digits in the given data, as discussed in the rules below. Approximate calculations (order-of-magnitude estimates) always result in answers with only one or two significant digits.... It allows you to give your numbers more or less significant figures. It also outputs standard, scientific, and engineering notation with a specified number of significant figures. In the accepted answer there is …

**Question says give answer to 3 significant figures**

To express a number like 1000 to 2 or 3 significant figures, you must use scientific notation, for example, 1.0e3 or 1.00e3. When entering scientific notation, always use a lowercase e and an integer exponent, for example, 1.23e-5.... The number of significant digits in an answer to a calculation will depend on the number of significant digits in the given data, as discussed in the rules below. Approximate calculations (order-of-magnitude estimates) always result in answers with only one or two significant digits.

## How To Give An Answer To 3 Significant Figures

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## How To Give An Answer To 3 Significant Figures

### 3 - Significant figures Another method of giving an approximated answer is to round off using significant figures. The term 'significant' means 'having meaning', so you are only being asked to write down the numbers which are most important to the question you are being asked.

- (3.69) (2.3059) = 8.5088, which should be rounded to 8.51 (three significant figures like 3.69). Logarithms and Antilogithms When calculating the logarithm of a number, retain in the mantissa (the number to the right of the decimal point in the logarithm) the same number of significant figures as there are in the number whose logarithm is being found.
- an answer correct to 3 significant figures using the numerical values in the expression in (c) (or correct value from (a) and (b) if no working given in (c)) (Do not penalise use of moles of Na 2 CO 3 carried in calculator memory from (b)) and sign consistent with experimental results (+ sign required for endothermic reactions) and unit (J mol – 1 or kJ mol – 1) The second mark can be
- 14/08/2009 · You can't tell. The 0's might be significant. For instance, if you had an answer of 399.973 and you were told to give the answer to 3 significant figures, the answer would be 400.
- The correct answer is 300,000, BUT all of the significant figures are retained. The most correct way to write the answer would be 3.00000 x 10 5 . 16) (3.4617 x 10 7 ) ÷ (5.61 x 10¯ 4 )

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