How to find angles of rotation that will carry 12 sided polygon

If there are 3.281 feet in 1 meter, how many inches are in one centimeter

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?

The area of a circle is equal to 1 dm². find the radius of the circle.