Someone help me yo a park has a very large circular pond as part of the center where their biggest attraction is. The pond needs to be renovated by the summer.

Area:
Circumference:
Radius:
Diameter:

1) if a designer measures the pond and determines that the length of the pond across is 400 feet wide, what is the length of the radius?

2) The designer wants to plant new flowers around the pond, how many feet of flowers would she need to plant in this new design?

3) the designer wants to determine how much is covered on the surface once the pond is filled up, she claims that the area would be 160,000π square feet. Is she correct? Justify your answer showing work.

4) the designer sketched a model of the pond. The model of the pond. The model drawing had a circumference of 10π inches. What is the area of the model she drew? Round your answer to the nearest tenth.

please help ASAP