HELP ME WITH SIGNIFICANT FIGURES PLEASE
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HELP ME WITH SIGNIFICANT FIGURES PLEASE

[From: ] [author: ] [Date: 12-09-04] [Hit: ]
USING THE CORRECT AMOUNT OF SIG. FIGS. WHATS THE CORRECT ANSWER FOR 111+128.925?3. USING THE CORRECT AMOUNT OF SIG FIGS WHAT THE CORRECT ANSWER FOR (15.......
1.HOW MANY SIG. FIGURES ARE IN THIS NUMBER? 0.0067
2. USING THE CORRECT AMOUNT OF SIG. FIGS. WHATS THE CORRECT ANSWER FOR 111+128.925?
3. USING THE CORRECT AMOUNT OF SIG FIGS WHAT THE CORRECT ANSWER FOR (15.03 X 4.87) DIVIDED BY 1.987?

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Significant digits are the ones without using trailing or leading zeros. It refers to precicion. when computing with two numbers, one may be more precise, and the other may be rounded. So for integrity, take the least amount of digits fopr your answer. (round)

Example, Joe precisely measured 32.54 ounces of fluid, and Barb threw in about 5 more ounces. The exact answer when you add those numbers would have two decimal places, but the significant digits would be the nearest whole number, or the LEAST amount of digits from the addends. 38.

1. 2

2. For addition and subtraction, the result should have as many decimal places as the measured number with the smallest number of decimal places (for example, 100.0 + 1.111 = 101.1).

111+128.925 = 240 rounded to the place of significant digits, ones (from 111, the number with the least significant digits.)

3. For multiplication and division, the result should have as many significant figures as the measured number with the smallest number of significant figures. Multiply and round to the digit of... the least number of digits in the factors/dividend or divisor.

(15.03 x 4.87)/1.987 = 36.83749370

The numbers on the left with the least amount of digits after the decimal have two digits after the decimal. Round to that place, the second digit after the decimal.

The answer is 36.84

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We just took care of this in my AP physics class...

1) 4; Explanation: when on the right of the decimal, ALL NUMBERS written are significant (eg. 0.005930 would have 6 SD)

2) 240 (239.9 rounds up); Explanation: When solving a problem, you want to answer with the least amount of significant digits given (and round if necessary). 111 has 3 SD whereas 128.925 has 6. USE [[[3]]]
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