This diagram represents one of the four levels of industry. Which term best completes the diagram?
?
Stylists
Cashiers
Nurses
A. Quaternary sector
B. Secondary sector
C. Primary sector
D. Tertiary sector

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?

The biggest component / ingredient of summer time smog is

17 points! ! (explain your answer)