Give an example of a situation when it would be appropriate to round a number and a situation in which it would not be appropriate to round a number. explain the difference in the situations.

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?