Liz makes and sells necklaces. It costs her $40 for the supplies to make 50 necklaces. How much must she sell each one for in order to make a profit of at least $250?

it has to be in a inequality thx :)

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected