Answer:
C. sea-floor spreading at a divergent boundary
Explanation:
"A" and "D" is incorrect because the action is the seafloor, not the mountain
"B" is incorrect because the passage states the seafloor is pulling apart not pushing in
(Sea-floor is the tectonic plate boundary)
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Answer:
A. Standard deviation is always a non-negative number.
Explanation:
The true statement about standard deviation is that, standard deviation is always a non-negative number.
A standard deviation is calculated by taking the square root of variance and as such the value of standard deviation is always a positive number and not a negative number.
Additionally, the variance of a sample population is calculated by the summation of all the squared distances obtained from the mean divided by the total number of samples. Hence, all the values of the variance are always positive (non-negative) numbers because they are squared. Consequently, the standard deviation would as well always be a non-negative number.
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To mix the yolk up inside the egg you need to have enough acceleration to smash the yolk up against the shell with a force sufficient to break the membrane the encloses the yolk even though the chalazae are trying to keep the yolk in the middle of the egg.
