Answer:
An observational study
Explanation:
observational studies are those a study where the researcher observes the effect of a defy factor, diagnostic test, treatment or other intervention without trying to change who is or isn't exposed to it. Cohort study and control studies are of two observational studies. These are the part of fundamental of epidemiological research. These are called observational studies because the investigators observe individuals without manipulation and intervention. These studies are an important category of study design. Well, design observational studies maybe the next best method to address these types of questions.
Answer:
x <2
Step-by-step explanation:
9(2 + 3x) < 72
Divide each side by 9
9/9 *(2 + 3x) < 72/9
2+3x < 8
Subtract 2 from each side
2+3x-2 < 8-2
3x<6
Divide each side by 3
3x/3 <6/3
x <2
The answer is 90 because you need to do 6x15 which =90
Percent decrease=100*decrease/original
decrease=original-saleprice
decrease=129-65
decrease=64
percent decrease=100*64/129
percent decrease=100*0.496124
percent decrase=49.6124
about 50% decrase
Answer:
Percentage Calculator: 12 is what percent of 70? = 17.14.
Step-by-step explanation:
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