Diane, I'm sure you were given formulas for these quantities. Here they are again (π is the Greek letter pi): C (circle)     = 2 π r A (circle)     = π r2 V (cylinder) = At = π r2 t Just plug in your values and round appropriately.

This rate is the ratio of the number of incomplete records and the number of discharges for the period. rate = # incomplete / # discharges        = 234 / 1051

This looks like it should be a double-angle rule: sin(2x) = 2 sin x cos x The double-angle rules derive from the sum formulas sin (a + b) = sin a cos b + cos a sin b          and cos (a + b) = cos a cos b - sin a sin b by setting b = a sin...

Delinquent record rate = # delinquent records / total discharges                                  = 561 / (3 * 1700)                          ...

This is an exercise in understanding, so it isn't truly a math problem. In my mind, the obvious fill-in is "panic". Don't panic when you see the term "function". I would extend that to  Don't panic over any concept in math. Panicking doesn't help you understand...