Answer:
Step-by-step explanation:
Thw probability is .
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Answer:
See Discussion below
Discussion:
Let a/b and c/d be rational numbers we wish to multiply. Then
(a/b) * (c/d) = (a*c)/(b*d)
The numerator (a*c) is the product of two integers ( a and c) and the denominator (b*d) is also ( b and d). In that way multiplying rational numbers is like multiplying integers.
Thank you,
MrB
Answer: cross-sectional study
Step-by-step explanation:
- A cross-sectional study is a kind of research study in which a researcher collects the data from many different persons at a single point in time.
- In this study researcher observes the variables without influencing them.
Here, A research company uses a device to record the viewing habits of about 2500 households (that includes different persons such as adults , children and seniors )
The data collected today(at a single point in time).
If it is used to determine the proportion of households tuned to a particular children's children's program.
The type of observational study is described in the problem statement : "cross-sectional"
Answer:
No, they are not congruent
Step-by-step explanation:
By CD and EF being congruent, we want to know if they are equal.
What we can simply do here is to find the distance between the points present.
That is, the distance between C and D, the distance between E and F
To get the distances between two points , we use the following equation
D = √(x2-x1)^2 + (y2-y1)^2
For CD, we have
D = √(6 -(-1)^2 + (-7 + 7)^2
D = √(7)^2 = 7 units
For EF, we have
D = √(5-5)^2 + (-5-3)^2
D = √(-8)^2
D = √(64) = 8 units
This clearly shows that they are both not congruent
I think it’s the second one b
I hope this helps :)
