music: 90's Chart Toppers: Name The Artist: Informer?

Questions

what are large snow bumps known as in skiing terms?

obesophobia is a fear of ______?

odontophobia is fear of ______?

in this team sport each player gets a chance to play every position?

branch of mathematics concerned with the study of such concepts as the rate of change of one variable quantity with respect to another, the slope of a curve at a prescribed point, and the computation of the maximum and minimum values of functions?