A certain investment of $2.000 earns interest at a fixed annual rate, with interest paid monthly to the investor. If the monthly interest payment is $10, what is the annual interest rate?
A region in a plane is said to be convex if, for every two points in the region, the line segment joining the two points is completely contained in the region. If a sector of a circle has a central angle with degree measure m > 0, which of the following determines the set of all values of m (less than 360) for which the sector is convex?
What is the value of x + y?
How many of the Integers from 100 to 999, Inclusive, do NOT contain either the digit 2 or the digit 5 ?
For each international call made to Country B last month, a certain telephone company charged a customer $075 to connect the cal plus a certain per-minute rate applied to each minute or part of a minute of the duration of the call. If the telephone company's total charge for the customer's calls to Country B last month was $84.00, what was the per-minute rate, in dollars?
(1) The telephone company connected 12 calls for the customer to Country B last month.
(2) If the telephone company had no connection fee last month but had charged a per-minute rate that was 20 percent greater than the rate the customer was actually charged, then the total charge for the customer's calls to Country B last month would have been $90.00.