Answer:
The ratio of boys to girls is 4:5. So let 4x be the number of boys and 5x be the number of girls. Then 4x+5x = 9x is the total number of students. Then the fraction of boys in the class is 4x/9x = 4/9.
Answer:
A because he can press it whenever he wants to and that will be variability because it is different
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Step-by-step explanation:
0.329, 127.5, and -89 is rational. Square root of 101 is irrational.