A research group interested in understanding the effect of listening to classical music on learning
mathematics conducted a study. One hundred students were randomly assigned to one of two groups.
The first group listened to classical music as they learned a new lesson. The second group learned the
same lesson with no music playing. Both groups were tested on the new material to determine how
much they learned. The results for the two groups were compared. What kind of study is this? (2
points)

Cameron indoor stadium at duke university is one of the most revered sites in all of college basketball, as well as in all of sports period. duke’s men’s and women’s basketball programs have attained quite a few wins in the building over the last seventy years. cameron indoor stadium is capable of seating 9,460 people. for each game, the amount of money that the duke blue devils’ athletic program brings in as revenue is a function of the number of people in attendance. if each ticket costs $45.50, find the domain and range of this function.

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)