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NISA [10]
2 years ago
7

company that manufactures a popular multivitamin wanted to determine whether their multivitamin had any side effects. For its in

itial study, the company chose 2000 individuals to take one of their multivitamin tablets per day for one year. Scientists from the company surveyed the participants to determine whether they had experienced any side effects. The greatest problem with this procedure is that A) only one brand of vitamin was tested B) the study lasted only one year C) the sample size was not large enough D) no control group was used
Mathematics
1 answer:
MAXImum [283]2 years ago
3 0

Answer:

Option D

Step-by-step explanation:

In this experiment, It would have been scientific to compare the result of the experiment on the experimental group(taking the multivitamin) with the control group (Taking no medicine)

Without a control group, a defined impact of multivitamin over the experimental group cannot be deduced.

Hence, option D is correct

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Given that (-1,-1) is on the graph of f(x), find
nalin [4]

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Step-by-step explanation:

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8 0
2 years ago
Write x2 - 2x + 5 = 0 in vertex form. (Be sure to write your response in the form a(x-h)^2+k=0 with no spaces!)
Drupady [299]
To write the given quadratic equation to its vertex form, we first form a perfect square.
 
                x² - 2x + 5 = 0
Transpose the constant to other side of the equation,
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Complete the square in the left side of the equation,
              x² - 2x + (-2/1(2))² = -5 + (-2/1(2))² 
Performed the operation,
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Factor the left side of the equation,
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Thus, the vertex form of the equation is,
          <em>  (x-1)² + 4 = 0</em>
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Step-by-step explanation:

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Step-by-step explanation:

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