posted by .

when we do convertions, do we have follow the rules for rounding?
is it 118.5cm=1.19m, or 118.5cm=1.18m?

It depends upon how many significant figures (sf) you are allowed, whether you are doing converSions or calculating some other problem. By definition, there are 100.000000000 cm in 1.00000000000 meter; therefore, 118.5 cm = 1.185 m. You have 4 sf in 118.5 and you are allowed to have 4 in the answer.

the precision of the stopwatch is 0.01second, if the question ask us to provide the answer to the nearest 0.1second,so...
12.65seconds=12.6 or 12.7seconds?

Some people do rounding differently when the last number is a 5. I follow the rule to "round to the even number." Therefore, I would round to 12.6 since 6 is the even number. If it were 12.75, I would round to 12.8 (the nearest even number). I hope this helps.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Which of the following is NOT true? A. A measurement contains significant figures and units. B. All numbers should be recorded from a digital readout. C. The uncertain digit is estimated between the last two markings. D. If an average
  2. Word Problem

    I have a couple of questions. Could you please check one of them and help me with one?
  3. Statistics

    Hi - I have some data from a biology experiment that I need to find out if it is significant and I don't know what test to use - maybe Anova - but I am not sure which variables are which. I used 4 levels of light (from dark to bright). …
  4. Science

    I'm a little confused when it comes to significant figures. Where it doesn't make sense to me is when zeros come before and after a number. For example: My book states that zeros that come before a digit are NEVER significant. Now …
  5. Philosophy

    Construct natural deduction proofs for each of the following. 118.2 p&(q&r).'. q 118.4 .'. ¬(p&(q&¬p)) 118.10 q .'. ¬(¬p&¬q) 122.3* p " q, ¬p " r .'.¬q " r 122.7* p " q, ¬(p " r) .'. ¬(q " r) 122.10 p " q, ¬q .'. ¬p
  6. Geometry

    Find the surface area for each of the following Rt. Square Pyramid 6.5cm 2.5cm,2.5cm
  7. Physics with work, pls help

    A proton is moving in a circular orbit of radius 11.8 cm in a uniform magnetic field of magnitude 0.232 T directed perpendicular to the velocity of the proton. Find the orbital speed of the proton. Answer in units of m/s. I came up …

    I thought it was similar so I wrote... x + y = 30cm^3 x + 2y = 61.5cm^3 i.e 2x + 2y =60cm^3 x + 2y = 61.5cm^3 therefore x= -1.5cm^3(volume of methane) and y= {61.5-(-1.5)}/2= 31.5cm^3(volume of ethane) However my teacher said the volume …
  9. a

    A rectangle is 3times as long as it is wide the perimeter is 60cm. Find the dimensions of the rectangle round to nearest tenth if necessary answers are 7.5cm.by22.5cm., 7.5cm.by52.5cm., 20cm.by60cm., 15cm.by22.5cm thanks
  10. Math to Ms.Sue (urgent )

    11.   Lorenzo has a checkbook balance of $118.00. He writes two checks, one for $9.00 and one for $84.25. He then deposits $95.00. Finally, he uses his calculator to determine his new balance. Which one of the following series represents …

More Similar Questions