Science, Maths & Technology
Rounding and estimation
...determined by working out the circumference of a circle. The relationship between circumference and radius is: circumference = 2 × × radius. So distance travelled around Sun = 2 × × 92 860 000 miles. Using a calculator button gives distance = 583 456 587.6 miles. (a) For convenience round this to two significant figures and write this in words. (b) Given that the...