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20 (a) Write 7357 correct to 3 significant figures. (1) 17 +42 (b) Work out 7.32 Write down all the figures on your calculator display. rss'.. O. (2) (Total for Question 20 is 3 marks) 21 Last year Jo paid £245 for her car Insurance. This year she has to pay £883 for her car insurance. Work out the percentage increase in the cost of her car.. Question. 1 a) Write 7357 correct to 3 significant figures. [1 mark] b) Work out. Write down all the figures on your calculator display. [2 marks] Back to Question.

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For example, to round 5.6325 to hundredths, you would use 3 significant figures, while to round 132.125 to hundredths, you would use 5 significant figures). Rounding 15.9375 to 4 significant figures, we get: The last digit we keep is 3: 15.9375. The digit after 3 is 7. 7 is greater than 5. Therefore, the last digit should increase by 1: 3 + 1 = 4.. Answer: 7360. Step-by-step explanation: When rounding off take into account certain steps, Like, - Non-zero digits are always significant. -Zeros between non-zero digits are always significant. -Leading zeros are never significant. -Trailing zeros are only significant if the number contains a decimal point and in this case there is no decimal.