Questions: Unit Exam - Populations r = (CBR + IMA) - (CDR + EM) CBR = 1% IMA = 1% CDR = 1% EM = 3% What is r? -2% 4% 6%

Unit Exam - Populations r = (CBR + IMA) - (CDR + EM) CBR = 1% IMA = 1% CDR = 1% EM = 3% What is r? -2% 4% 6%
Transcript text: Unit Exam - Populations \[ \begin{array}{c} r=(C B R+I M A)-(C D R+E M) \\ C B R=1 \% \quad \text { IMA }=1 \% \\ C D R=1 \% \quad E M=3 \% \end{array} \] What is $r$ ? -2\% 4\% 6\%
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Solution

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To find the value of \( r \), we need to use the given formula:

\[ r = (CBR + IMA) - (CDR + EM) \]

Substitute the given values into the formula:

  • \( CBR = 1\% \)
  • \( IMA = 1\% \)
  • \( CDR = 1\% \)
  • \( EM = 3\% \)

Now, calculate each part of the formula:

  1. \( CBR + IMA = 1\% + 1\% = 2\% \)
  2. \( CDR + EM = 1\% + 3\% = 4\% \)

Substitute these results back into the formula for \( r \):

\[ r = 2\% - 4\% = -2\% \]

Therefore, the answer is \(-2\%\).

Explanation of options:

  • \(-2\%\): This is the correct answer, as calculated above.
  • \(4\%\): This would be incorrect because it does not account for the subtraction of \( CDR + EM \).
  • \(6\%\): This is incorrect as it does not match the calculation from the given values.

In summary, the correct answer is \(-2\%\).

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