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Rashid [163]
3 years ago
11

A dentist conducts a survey to determine whether a certain brand of mouthwash improves gum health more than others. When his pat

ients come in for their regular cleanings, the dentist surveys them about their mouthwash use and makes a conclusion based on the survey results. The conclusion drawn from the study is because the sample is . In this instance, an study was conducted.
Mathematics
2 answers:
kicyunya [14]3 years ago
4 0

Answer: The conclusion drawn from the study is *invalid* because the sample is *biased*. In this instance, an *inappropriate* study was concluded.

crimeas [40]3 years ago
4 0

Answer:

The conclusion drawn from the study is NOT VALID because the sample is BIASED. In this instance, an INAPPROPRIATE study was conducted.

Please mark me brainliest, I really need it.

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um I dunno because I need points to ask a question sorry

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Answer:

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Step-by-step explanation:

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5 0
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A village was founded four hundred years ago by a group of 20 people. In this village, the population triples every one hundred
Paha777 [63]

Answer:

Step-by-step explanation:

Treat this like compound interest:  Use A = P(1 + r)^t.

Here, P is the initial population and A is 3 times that, or 3P.  Since P = 20 people, 3P = 60 people,

and this population is reached after 100 years.

We need to determine r, substitute its value into the formula A = P(1 + r)^t, and then determine the population of the village after 400 years.

60 = 20(1 + r)^100

Simplifying, 3 = (1 + r)^100.

Taking the natural log of both sides,

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                   ln 3

ln (1 + r) = ---------------

                    100

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We must solve this for r.  Raising e to the power ln (1 + r), on the left side of an equation, and raising e to the power 0. 01986 on the right side, we get:

1 + r = 3, so r must = 2.

Now find the pop of the village today.  Use the same equation:  A = P (1+r)^t.

A = 20(1 +2)^4 (hundreds),

or

A = 20(3)^4, or

A = 81

The population after 400 years is 81.

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dem82 [27]

Answer:

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anygoal [31]
There are 4 per row.
12 divided by 3 = 4.
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3 years ago
Read 2 more answers
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