In the diagram the radius of the outer circle is 2X centimeters in the radius of the inside circle is 6 cm the area of the shaded region is 220 pi centimeters squared what is the value of X

Abank manager wants to encourage new customers to open accounts with principals of at least $2 comma 500. he decides to make a poster advertising a simple interest rate of 3%. what must the principal be if the bank manager also wants to advertise that one can earn $10 the first month? can the poster correctly say, "open an account of $2 comma 500 and earn at least $10 interest in 1 month! "?