How do u say "Math class starts at nine thirty in the morning" in spanish most simpl way

Clase de matemáticas comienza a las nueve y media de la mañana.

Las matemáticas comienzan a las 9:30 de la mañana.

the former currency of el salvador who honored an american sailor was:

answer: christopher columbus

the 200 (doscientos colones) was the currency that showed a picture of christopher columbus in front of the bill with a ship - this currency ran from 1892-2001, it was then replaced with the u.s. dollar.

i hope this .