Please help! read the explanation and answer the question that says “about how many times faster does light travel than sound in dry air?”

The highest common factor of 132 and 220

Which of the following is true for the relation f(x)=2x^2+1

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?