Point Q is the centroid of △ABC. QF = _ centroid

Can someone me do math because i am having a breakdown rn because i don’t get it

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?

Anyone know these questions? i need ,.