I need help The radius of a circle is 4 feet. What is the area?

p=4 ft

Give the exact answer in simplest form.
square feet

What kind of bond pays interest which is exempt from tax?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

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?