17.2
62.2
13.2 percent (rounded to 1dp).
9.4
326.6
It is: 21.2
14.0
8.8
It depends what number you're rounding to. (dp=decimal place) 0.7234 (4dp) 0.723 (3dp) 0.72 (2dp) 0.7 (1dp) 1 (1sf (significant figure))
Circumference of a circle is equal to pi*diameter, or 2*pi*radius, so if d=17.4cm, c=54.7cm (to 1dp), if r=17.4cm, c=109.3cm (to 1dp).
The radius is 3.45
It is: 276.3 because 0.02 is less than 0.05