Answer:
160 cm
Step-by-step explanation:
a square has 4 equal sides. if one of the sides is 40 cm, then all of the other sides are 40 cm as well. to get a perimeter, you add up the lengths of all the sides. if there are 4 sides of 40 cm, you multiply 40 by 4 to get 160, finally add the unit to get 160 cm.
If the highest power of the numerator is less than the highest power of the denominator, then the limit as it approaches infinity is zero
Hope that helps!
72: 1,2,3,4,6,8,9,12,18,24.36,&72
18: 1,2,3,6,9, &18
18 is the greatest common factor in this problem