Friday

October 24, 2014

October 24, 2014

Posted by **kelie** on Sunday, September 18, 2011 at 7:34pm.

A)2.543 m x 39.4in/1m=100.1924in

B)2 L x 1.06qt/1L=2.12 qt

C)24.95 min x 1hr/60 min=0.4158 hr

D)12.0 ft x 12in/1ft x 2.54cm/1in=370cm

E)24.0 kg x 1lb/2.20kg=11lb

the answer is c but i dont understand why. i thought you round the answer based on the number of sig figs of the lowest measurement so why wouldn't D be the answer?

- math/chem significant figures -
**bobpursley**, Sunday, September 18, 2011 at 7:42pmC is correct

D is correct if the zero has a line over it (ie, a significant zero)

c is correct becaues 1hr/60 min is NOT a measurement, it is a fundamental conversion. 1hr/60min is an infinite number of significant digits.

d is correct only if the last zero is designated as significant, we once put a line over the zero to indicated it is significant. It doesn't show that here.

- math/chem significant figures -
**kelie**, Sunday, September 18, 2011 at 7:50pmbut i though d would be rounded to 2 sf, not 3 because of the 12 in. or is that wrong because 12in/ft is not a measured number?

**Answer this Question**

**Related Questions**

Math - 1. Is it more appropriate to use scientific notation for approximates or ...

Math - Any help would be appreciated! What is 38.896/5.1 + 509.15 to the correct...

Chemistry - I have a Chemistry question which should be very simple but I do not...

Significant Figures - I'm having a hard time with significant figures. Any help ...

Science (Chemistry!) - I just do not understand ANYTHING about multiplying/...

Chemistry - answear in standard exponential form with correct number of ...

Significant figures - How would I go and express these numbers with 3 ...

Significant Figures - Report the following to two significant figures a. 3.1459...

math - write 480 in a) 1 significant figure b) 2 significant figures c) 3 ...

Science- Significant Figures - You calculate the area of a 150m x 100.0 m room. ...