Kareem wants to find the number of hours the average sixth-grader at his school practices an instrument each week. Which is the
best way Kareem can get a representative sample? He can randomly survey 50 boys in the school.
He can survey 30 students in the school band.
He can randomly survey 50 sixth-graders in the school.
He can survey 20 friends from his neighborhood.
He can randomly survey 50 sixth-graders in the school. Because if he asked 30 people in the band some people might be in a different grade, if he randomly 50 boys in the school then what if half didn't even play anything. If he did friend what if most friends don't even play a instrument.
Then which one would it be it would be more easier if he did 50 random sixth-graders because they might know friends or themselves and a person who plays an instrument.
F(x)=x(3x+5) or f(x)=3x²+5x Here the domain in general is: -∞<x<∞ But the length of the rectangle cannot be negative, therefore the domain is all real numbers greater than zero.
