The answer is 3, just do 20*0.15 (covert 15% into a decimal).
It's 6.9. Just do the circumference divided by pi
A 100 m
B 900m
C -5,100m
D- 8,800
A four-dimensional space or 4D space is a mathematical extension of the concept of three-dimensional or 3D space. Three-dimensional space is the simplest possible generalization of the observation that only three numbers, called dimensions, are needed to describe the size or position of objects in the everyday world. For example, the volume of a rectangular box is found by measuring its length (usually labeled x), width (y), and depth (z).
