Find the value.Let

The position vector of a particle is r(t). Find the requested vector.The velocity at t = 3 for r(t) = (9t2 + 4t + 7)i – 5t3j + (2 – t2)k

Calculate the arc length of the indicated portion of the curve r(t). r(t) = (8 + 2t3)i + (2t3 – 2)j + (5 – t3)k ; -1 ≤ t ≤ 2

Which of the following statements correctly describes the key difference between stratified sampling and quota sampling?

Seniors at the ABC high school in Salt Lake City, UT, is your population of interest for your research. Which of the following procedures will result in a systematic random sample of 100 students from the list of 1,000 seniors?  

When McDonald’s studies traffic patterns and population density patterns in order to select sites for future restaurants, this is an example of which type of research?

Reach, one of the key metrics used in social media analytics, refers to the number of unique people who have actually seen the post/mention. 

_____________ offers market insights into top search queries in Google Search based on the popularity of the keywords. 

Primary research is synthesis of existing data.

In cluster sampling, the subgroups are internally ___________, but externally_____________.