Which institute would you attend if you wanted to enter a graduate program in math?

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

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

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)