The sum of squares of 10 terms is 38500, variance is 825, then coefficient of standard deviation is a) 0.24 b) 0.25
c) 0.42
d) 0.52
And explain it.

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.

Which equation represents h for right triangle abc