Why is it that students vary in the way they deal with the aftermath of certain disasters (physical, psychological, socio-cultural, economic, political, and biological)?​

The arizona department of transportation wishes to survey state residents to determine what proportion of the population would like to increase statewide highway speed to 75 from 65 mph. at least how many residents do they need to survey if they want to be at least 99% confident that the sample proportion is within 0.09 of the true proportion?

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?

What would you call a political system that is only meant to last for a short time