In 1998, the University of Wisconsin collected data on means of transportation to work. In 2008, Betsy (a University of Minnesota student) used the data for her own project. Betsy is using which data collection method?

a. Secondary Analysis

Step-by-step explanation:

Secondary Analysis of data is simply analysing data that was collected by someone else.

It is simply carrying out a research with the data that was collected by another person, most times the data has been used for a primary purpose.

Secondary analysis is an empirical exercise which applies the same basic research principles as researches utilizing primary data and has steps to be followed just as any research method.

Betsy is using the Secondary analysis because the data she is making use of has been collected originally by the school and has been used already for a primary purpose or research.

She didn't collect the data herself.

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%