8572.5 rounds to 1 s.f. as
9E3.
The density of water is 1gm/cm^3. Use the density and these dimensions to find the mass of the water in grams in a fish tank. Use the rules of significant figures and rounding to come up with the correct answer.
30 cm width * .075 meters length * 15 inches high
I got 8572.5 gms for the mass of the water, but I can't figure out how to round the number to 1 sig fig.
3 answers
Not sure what 9E3 means. 9000?
And is my calculation of 8572.5 gms correct?
And is my calculation of 8572.5 gms correct?
Your calculation is correct.
9E3 means 9 x 10^3. Obviously you can't write this the usual way because that shows 5 s.f. Rounding one less number at a time gives us 8572, 8570, 8600 and 9000. Since we are allowed only one s.f., that can be written as 9000 (but many misinterpret that number as having 4 s.f. and that can be avoided by writing it as 9 x 10^3 or 9E3 and there no ambiguity about that.
9E3 means 9 x 10^3. Obviously you can't write this the usual way because that shows 5 s.f. Rounding one less number at a time gives us 8572, 8570, 8600 and 9000. Since we are allowed only one s.f., that can be written as 9000 (but many misinterpret that number as having 4 s.f. and that can be avoided by writing it as 9 x 10^3 or 9E3 and there no ambiguity about that.
2 answers