Ahotel wants to put a fence around a circular spa. the radius of the spa is feet. if the fence is built along the immediate edge of the spa, what is the perimeter of the fence? (recall that the perimeter of a circle is , where r is the radius of the circle.)

Icould really use some with this question.

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.

Ineed with math stuff it involves graphs