Is the following relation a function?

What's the difference between: x≥0 and nonnegative integer. ?

What other information do you need to prove triangle dac=bca by asa

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