can someone help me on this one plz. it has been reported 78% of federal government employees use e-mAIL. If a sample of 215 government employees is selected, find the mean, variance, and standard deviation of the number who use email

Shannon drove for 540 minutes. if she traveled 65 miles per hour, how many total miles did she travel?

If f(x) = 3x2 - 2x+4 and g(x) = 5x + 6x - 8, find (f-g)(x).

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?