Round 3,989.23655 to the nearest thousandth.

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Which expression is equivalent to 2x^2+7x+4?

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.