The x because it is a male chromosome and have one more than a girl <span />
Answer:
Day time period have we as humans been here: 26 seconds
Explanation:
4,500,000,000 years = 1 day
1,400,000 years = X
X = 0.0003111
1 day = 86,400 seconds
0.0003111 = X
X = 26 seconds
In term of the Earth in 24-hour clock, <em>Homo sapiens</em> appeared on our planet only in the last 26 seconds, it means that in geologic time, humans have existed for only a brief time period and thereby it is a relatively new species.
This means that her weight is 1.5 standard deviations below the mean. The z-score informs us how many standard deviations above or below the mean a sample (in this case the woman's weight) is. Standard deviation is a statistical measure that expresses how much a sample differs from the mean value of a population or a group of samples.
I believe you use the pH scale with comparing acids and bases.
A)Antibiotics can always be used to treat bacterial infections.
