100 POINTS HELP The vectors v and w lie in the xy-coordinate plane such that their initial points are at the origin and both vectors have a magnitude of 1. The direction of vector v is 45° north of east, and the direction of vector w is 45° south of east. What is the magnitude and direction of the vector v + w?

A
v + w has a magnitude of 2 and a direction of east.

B
v + w has a magnitude of 2√ and a direction of east.

C
v + w has a magnitude of 2√4 and a direction of east.

D
v + w has a magnitude of 2 and a direction of north.

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

Solve: 3x+y=6 4x-2y=18 show all work !

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.