Acomputer manufacturer is performing a quality check to make sure the computers’ sound cards are working correctly. the plant manager tested 1,000 computers on monday and found that 4 had defective sound cards. what is the experimental probability of a computer having a bad sound card?

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?

Solve the triangle. a = 21°, c = 105°, c = 5

Can someone tell me if this is perpendicular? !