Consider U = {x|x is a negative real number}.
Which is an empty set?
0 {x|x e U and x has a negative cube root}
XX e U and x has a negative square root}
{x|x e U and x is equal to the product of a positive number and -1}
O {xx € U and x is equal to the sum of one negative and one positive number}

Is the following relation a function? x y 1 4 −1 −2 3 10 5 16 yes no

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.

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189