Answer:
D. 0.821
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
The combinations formula is important to solve this question:
is the number of different combinations of x objects from a set of n elements, given by the following formula.
Desired outcomes
The order is not important. For example, Elisa, Laura and Roze is the same outcome as Roze, Elisa and Laura. This is why we use the combinations formula.
At least 3 girls.
3 girls
3 girls from a set of 5 and 2 boys from a set of 3. So
4 girls
4 girls from a set of 5 and 1 boy from a set of 3. So
5 girls
5 girls from a set of 5
Total outcomes
5 from a set of 8. So
Probability
So the correct answer is:
D. 0.821
If it there are two negative #'s you add them because they are on the same side of the number line.
The last one is the answer.
4.04 × 10⁸, because 4.04 > 2.51
Pick any value in the y column of the table. I'm going to pick 81. Divide the value you picked by the previous y value, which in my case would be 9
Dividing the values gives: 81/9 = 9
So the base is 9. We multiply each y value by 9 to get the next y value
Eg: to go from 1/81 to 1/9, we multiply by 9. Same for 1/9 to 1, and so on.
Answer: Choice B) 9
Note: This trick only works because x is increasing by 1 each time
-8h - 2h^2
f(2)-f(2+h) = -8h - 2h^2
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