Select the best response. Round 931,487 to four significant digits, then three s

Question

Select the best response. Round 931,487 to four significant digits, then three significant digits, then two significant digits.

A.

Four significant digits – 931,400; three significant digits – 932,000; two significant digits = 900,000.

B.

Four significant digits – 931,500; three significant digits – 932,000; two significant digits = 930,000.

C.

Four significant digits – 931,400; three significant digits – 931,000; two significant digits = 930,000.

D.

Four significant digits – 931,500; three significant digits – 931,000; two significant digits = 930,000.

Explanation / Answer

931,487

1. four significant digits - 931500

(931,487)

look at the number formed after 3rd digit = 487

it is closer so 500 rather than 400

so 487 is replaced by 500

2. three significant digits - 931000

same as above, look after 2 digits,

1487 is closer to 1000 rather than 2000

3. two significant digits - 930000

answer is option D.

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