From the probability distribution, find the standard deviation for the random variable x, which represents the number of cars per household in a town of 1000 households.

x P(x)
0 0.125
1 0.428
2 0.256
3 0.108
4 0.083

Which specimen would best be viewed using a compound light microscope?

The smokey mountains have over 2,100 miles of rushing mountain streams and rivers that flow through the park. in each mile lives a diverse community of native fish, amphibians, insects, and larvae, some of which are found only in the southern appalachians. park managers and scientific researchers test many factors such as fish populations, the watersheds and water tests to determine a) too many lizards are present b) the water quality of the stream c) rainwater is running into local streams d) if visitors to the park are overstaying their welcome

In what type of gpa are honors, ap, ib and dual enrollment courses given additional points? a) cumulative gpa b) weighted gpa c) unweighted gpa d) semester gpa