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cupoosta [38]
3 years ago
8

A study showed that people who take a B12 vitamin daily have a significantly better chance of protecting against Alzheimer's dis

ease than those who did not take the vitamin daily. Which of the following statements is/are correct?
I. This study provides evidence that taking a B12 vitamin daily contributes to protecting against Alzheimer's disease.
II. The general health consciousness of people who take B12 vitamins could be a confounding variable.
III. This is an observational study and not an experiment.
a. l only
b. III only
c. l and II only
d. ll and III only
e. I, II, and III
Mathematics
1 answer:
marishachu [46]3 years ago
3 0
A. 1 only- this study provides evidence that taking B12 vitamin daily contributed to protecting against Alzheimer’s disease.
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5

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22. Mona is in her garden jumping on stones (as shown below).
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\large\green{\sf\boxed{Given:-}}

<u>Mona starts from 68th stone</u>

<u>She jumps</u><u> </u><u>23</u><u> </u><u>stones</u><u> </u><u>ahead</u><u> </u>

<u>Then</u><u> </u><u>she</u><u> </u><u>jumps</u><u> </u><u>28</u><u> </u><u>stones</u><u> </u><u>back</u>

\large\red{\sf\boxed{To \:find:-}}

<em>Her final position=?</em>

\large{|\underline{\mathtt{\red{S}\blue{o}\orange{l}\pink{u}\blue{t}\purple{i}\green{o}\red{n}\blue{:}\orange{-}}}}

  • Add 23 in 68 [Given]

\begin{gathered}\\ \sf\longmapsto 68+23=91\end{gathered}

  • Subtract 28 from 91

\begin{gathered}\\ \sf\longmapsto 91-28=Her\:final\:position\end{gathered}

\begin{gathered}\\ \sf\longmapsto =63\end{gathered}

  • To find how much stones she is ahead or back we will Subtract 63 from 68 which was her initial position.

\begin{gathered}\\ \sf\longmapsto 68-63=5\end{gathered}

So, Mona will be <em><u>5</u></em><em><u> </u></em><em><u>stones</u></em><em><u> </u></em><em><u>behind</u></em><em><u> </u></em><em><u>from</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>starting</u></em><em><u> </u></em><em><u>stone</u></em><em><u>.</u></em>

☯️Hence, Option C is correct

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2 years ago
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This is so hard not gonna lie :0
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2 years ago
Easy math questions for points​
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1/2 = 50%
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3 years ago
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