Consider u = {x|x is a positive integer greater than 1}.

which is an empty set?

{x|x ∈ u andone-half is prime}
{x|x ∈ u and 2x is prime}
{x|x ∈ u andone-half can be written as a fraction}
{x|x ∈ u and 2x can be written as a fraction}

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)