posted by .

Another confusing significant digit problem. I added 36.6 and 2.4, and divided the result by 4.803. The book says the answer is 7.91, but I don'[t see how that could be, since the lowest number of significant digits in the problem is two (2.4). I think the result should be 7.9, not 7.91. Why is this? Thanks ~Coralie.

  • Chem -

    Nope. When adding or subtracting, look for the lowest place value that is significant, in this case, tenths.
    Numerator is 39.0 three sig digits.

  • Chem -

    First, 36.6 + 2.4 gives 39.0, a number with three s.f. When you divide by 4.803 that give you a number of 3 s.f. for the answer; however, the answer isn't 7.91, it is 8.11993 which rounds to 8.12. Did you make a typo in the problem?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. what is

    1.3 /73.814 In significant digit notation, divid, and the answer to two significant digits. I will be happy to critique your work.
  2. Chemistry

    please check my answers for the following questions. 1) when a measurement that has six significant digits is divided by a measurement that has three significant digits, how many significant digits should the answer have?
  3. Chemistry

    We are currently studying significant digits/figures. I was asked to add 150 ml with 76.9 ml, plus 209 ml plus 0.036 ml. The book says the answer is 440, but I got 435. (the complete answer, without applying the significant digits …
  4. Chem

    How many moles of hydrogen and oxygen are in 2 moles of water?
  5. Physics

    Calculate the answer for the following question and state the answer with the correct certainty and units. Given the values of b and h, find A. b=3.2 cm, h=10.1 cm A=1/2bh The answer is 16 cm^2, which was rounded to two significant …
  6. chemistry

    this is over significant digits. -Indicate how many significant figures are in each of the following measurements: e) 4.0 X 10-5 kg i got 1 significant digit, but i'm not sure it if it's right... (& i can't ask my teacher, the situation …
  7. Physics - bobpursely

    State the number of significant figures. 1) 809 Answer : 3 2) 0.0060 Answer : 5?
  8. Physics

    Talking about significant figures, my Physics textbook lists 5 rules for determining significant figures. 1) All nonzero digits are significant. 2) Zeros to the right of nonzero digits in a number containing a decimal point are significant. …
  9. Chemistry

    When 25.302 is divided by 56.743, the answer should be reported to ____ significant digit(s). The result of the division, 25.302 / 56.743, reported to the correct number of significant digits is _______ When 56.743 is subtracted from …
  10. algebra

    the sum of the digits of a three digit number is 14. the tens digits exceeds twice the hundred digit by one. If 3 were added to the number, the units and hundreds digit would be the same. find the number. solve H = hundred digit t …

More Similar Questions