Is this number rational or irrational? 2/5 squared

a. rational

b. irrational

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

How do i find the missing angle measure in a polygon