Within the town of Spanaway, 36% of the population lives on the lake. If 987 people live on the lake, what is the total population of Spanaway?

Can somebody me out with this question

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).