Help please don't know how to do this

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?