Question

question 1
we generally report a measurement by recording all of the certain digits plus ____ uncertain digit(s).
no
three
two
one
four

question 2
2 pts
convert 0.3980 m to mm.
0.03980 mm
398.0 mm
none of these
3.980×10³ mm
3.980×10⁴ mm

Explanation:

Step1: Recall significant - figure rule

In measurement, we record all certain digits plus one uncertain digit.

Step2: Recall length - unit conversion

We know that 1 m = 1000 mm. To convert 0.3980 m to mm, we multiply by 1000: $0.3980\times1000 = 398.0$ mm.

Answer:

Question 1: D. one
Question 2: B. 398.0 mm