A chemical company sells a specialized industrial lubricant in 20 liter containers. A random sample of the latest production lot shows the contents of 10 containers to be 20.62, 20.33, 19.76, 19.85, 20.67, 20.31, 20.64, 19.81, 19.5, and 20.35 liters. Find the standard deviation of the sampled containers’ contents. A. σ=0.55

B. σ=0.38

C. σ=0.40

D. σ=0.53

its a straight line parallel to the time axis

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.