Of the people who have taken their seats at a seminar, 2 have red hair, 5 have brown hair, 3 have grey hair, and 4 have black hair. What is the experimental probability that the next person to take a seat has red hair?

Given that (x-3) is a factor of f(x)=x^3+ax^2-x-6, find a and hence the number of real roots or the equation f(x)=0

Which graph represents 2x-5y< 15

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.