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Answers by Joseph J.

areas, circumferences and volume (answer)

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.

incomplete records for a period (answer)

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

Sin(x)=2sin(x)cos(x) (answer)

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 (answer)

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

Don't ___________ when you see the term "funcution". (answer)

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...

Can you help me? (answer)

Factoring polynomials is a matter of recognizing patterns, that is, common factors, and that takes practice, practice, practice. Here are two ways to factor this polynomial: f(x) = x3 + 3x2 – x – 3       = (x + 3) x2 – 1 * (x + 3)        ...