Posted by **kayla** on Wednesday, September 10, 2008 at 7:33pm.

I don't understand how to round to significant digits

565 lb * 30 ft

4900 ft/ 144 sec

786 hr * 23 miles per hour

- math/chemistry -
**bobpursley**, Wednesday, September 10, 2008 at 7:55pm
The first one will be to one significant digit because of the **3**0 has only one sig digit.

The second will have two because of the numerator.

The third will have 2 because of the denominator.

- math/chemistry -
**kayla**, Wednesday, September 10, 2008 at 8:00pm
I under stand this but once i get the answers i really don't know how to do it these re the answers i get

1. 16950

2. 34.02777778

3. 18078

but i don't understand how to round it like would the first one be 10?

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