sssved01
18.03.2020 •
Mathematics
The population density of Helenville is 17.5 turkeys per acre. Exactly 840 turkeys live in Helenville. How many acres is Helenville?
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Ответ:
48 acres
Step-by-step explanation:
Let
x ----> the number of turkeys live in Helenville
y ---> the number of acres in Helenville
P ---> the population density of Helenville
we know that
we have
substitute
solve for y
Ответ:
10.8109 amu
Step-by-step explanation:
The average atomic mass of boron is determined as the average of the atomic masses of both isotopes weighed by their respective abundances.
Therefore, the average atomic mass is given by:
The average atomic mass of boron isotopes is 10.8109 amu.