A circle's area is directly proportional to its radius squared. What is the constant of proportionality (to 2 decimal places)?
(Area of a circle = rr2)

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

The radius of a sphere is 3 inches. which represents the volume of the sphere?