magnitude estimate for 9.3*2.8=_
The exact answer for 9.3*2.8 is 26.04, but we only have 2 significant figures in each of the factors, so 26 is the estimate.
about 18
To estimate the magnitude of 9.3 * 2.8, we can round each factor to one significant figure.
9.3 rounded to one significant figure is approximately 10.
2.8 rounded to one significant figure is approximately 3.
Now, we can multiply these rounded numbers: 10 * 3 = 30.
So, the estimate for the magnitude of 9.3 * 2.8 is approximately 30.