An earthquake was felt throughout circular area of 1,808.64 square miles. what was the tadius of the circular area?

Sal is tiling his entryway. the floor plan is drawn on a unit grid. each unit length represents 1 foot. tile costs $1.35 per square foot. how much will sal pay to tile his entryway? round your answer to the nearest cent.

Can someone me with these two circle theorem questions asap?

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost