Which number is irrational? a) 16.5% b) 0.0675 eliminate c) 8 3/4 d) π

Mindy bought 5/8 pound of almonds and a 3/4 pound of walnuts.which pair of fraction cannot be used to find how many pounds of nuts she bought in all.

Can you me find the missing length. i attached an image.

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square