Diameter = 10.8 yd having lots of trouble with pi and finding the circumference : ( hope a local answer will out : )

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.

Aswimming pool measures 22ft by 12ft and is 4ft deep. if the pool is being filled at 2.5 cubic ft per minute, how long will it take to fill the pool?

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola