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mafiozo [28]
3 years ago
9

dentify the type of observational study​ (cross-sectional, retrospective, or​ prospective) described below. A research company u

ses a device to record the viewing habits of about 50005000 ​households, and the data collected todaytoday will be used to determinenbsp the proportion of households tuned to a particular sportssports program.. Which type of observational study is described in the problem​ statement?
Mathematics
1 answer:
Fantom [35]3 years ago
8 0

Answer:

- A cross-sectional study.

Step-by-step explanation:

A Cross-sectional study is demonstrated as the type of observational study in which the data or a representative subset of a population collected at a particular point in time is analyzed.

As per the given details, the observational study conducted by the research company would exemplify 'a cross-sectional study' as it aims to evaluate the data('viewing habits of about 50005000 ​households) collected at a specific point in time i.e. 'today' in order to 'determine the proportion of households tuning to a particular sports program.'

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What is the intermediate step in the form (x+a)^2=b as a result of completing the following equation? Please help.
aksik [14]

Answer:

(x+8) ^2=64

Step-by-step explanation:

that will give you your two solutions: x= -16 and x=0. I hope this helps!!!

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3 years ago
Consider the example of finding the probability of selecting a black card or a 6 from a deck of 52 cards.
Marina86 [1]

Answer:

The probability of selecting a black card or a 6 = 7/13

Step-by-step explanation:

In this question we have given two events. When two events can not occur at the same time,it is known as mutually exclusive event.

According to the question we need to find out the probability of black card or 6. So we can write it as:

P(black card or 6):

The probability of selecting a black card = 26/52

The probability of selecting a 6 = 4/52

And the probability of selecting both = 2/52.

So we will apply the formula of compound probability:

P(black card or 6)=P(black card)+P(6)-P(black card and 6)

Now substitute the values:

P(black card or 6)= 26/52+4/52-2/52

P(black card or 6)=26+4-2/52

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P(black card or 6)=28/52

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Hence the probability of selecting a black card or a 6 = 7/13 ....

7 0
3 years ago
Item 8 Solve for x. Use the quadratic formula. 2x2−5x−9=0 Enter the solutions, in simplified radical form, in the boxes.
Lubov Fominskaja [6]

Answer:

5+√97/4

Also 5-√97/4

Step-by-step explanation:

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This means that we should plug the values for A B AND C into the formula

We can work out that

<u><em>A = 2</em></u>

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5+√97/4 (all over 4) aka 3.71

Also 5-√97/4 (all over 4) aka -1.21

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Answer:

should be 3^X = 7 and X = log7/log3

Step-by-step explanation:

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