To control for the possible lurking variables when assigning subjects to the experiment's treatments, use: , O explanatory and response variables.
O a placebo and double-blinding.
O probability sampling and confounding.
O blocking and randomization.

a

step-by-step explanation:

60.9774

step-by-step explanation:

because when you add 47.6 plus 7.32 equals 54.92

and when you add .0574 + 6= 6.0574

and when you add 54.92 and 6.0574 you get the answer of 60.9774.

plzz mark brainlest last one got deleted. cause i didn't explain it but i did but i understand what the mod meant

i believe it is 0.1m because the measurement of 30.4m limits how precise you can be

you can only be as precise as the least precise measurement