Round 720,051,852 to the nearest hundred

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

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

If the value of cos330°is√3/2 then find cos 165°.