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algol13
4 years ago
5

In a study to support drug discovery for patients with lung cancer, patients were divided into 3 groups based on the severity of

the disease. Smoking and alcohol consumption habits were recorded for all 3 groups. Is this an example of an observational study or experimental study
Mathematics
1 answer:
katrin [286]4 years ago
4 0

Answer:

It is an example of an observational study.

Step-by-step explanation:

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Soloha48 [4]

Answer:

See explanation

Step-by-step explanation:

<u><em>1st photo:</em></u>

x = \sqrt{15}

\frac{x}{5} = \frac{3}{x}

x^{2} = 15

x = \sqrt{15}

<u><em>2nd photo:</em></u>

(a) GEH ~ FGH ~ FEG

<em>similar triangles, use similar corners in the right order</em>

(b) \frac{FE}{GE} = \frac{GE}{EH}   AND    \frac{FH}{GH} = \frac{GH}{HE}

<em>similar triangles, use similar sides in proportion</em>

<em />

<u><em>3rd photo:</em></u>

x = 4.5 or 4 1/2

\frac{x}{3} = \frac{3}{2}

<em>2x = 9</em>

<em>x = 4.5 or 4 1/2</em>

<em />

<u><em>4th photo:</em></u>

Length of string = 118.2 ft

<em>sin(40) = 76/x</em>

<em>x = 76/sin(40) = 118.2</em>

7 0
3 years ago
A game uses the two spinners shown in the image. What is the probability that you will spin "East" and "1
luda_lava [24]
No se mucho inglés ok sorry lo siento 3
4 0
4 years ago
Micheal is 3 times as old as Brandon. 18 years ago, Micheal was 9 times as old as Brandon.
77julia77 [94]

Step-by-step explanation:

18÷3=6

6×9=54

HOPE THIS HELPS!!

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3 years ago
Eve got home from school at 2:20 P.M. And played video games for 17 minutes. Then she helped clean the kitchen for 1 hour and 1
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Answer:

4 :45 pm

Step-by-step explanation:

2 : 20 + 17 minutes = 2:37

2:37 + 1hr 1 minute  = 3 : 38

3 : 38 + 1 hr 7 = 4 :45 pm

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3 years ago
Number 6. I have no idea how to do this because the question doesn’t give enough information
Savatey [412]

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3 0
3 years ago
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