9.4
326.6
It is: 21.2
14.0
17.2
62.2
8.8
The correct answer is 20.0
The lower bound of 19.4 corrected to 1 decimal place is 19.3. This is because when correcting to 1 decimal place, you round down to the nearest whole number if the digit after the decimal point is less than 5. In this case, the digit after the decimal point in 19.4 is 4, so the lower bound is 19.3.
13.2 percent (rounded to 1dp).
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