11 is the answer. To get the answer you have to divide 31 1/2 by 2 3/4.
Answer:
45
Step-by-step explanation:
The area can be found by sectioning the polygon into three shapes. A rectangle with an area of 18 inches can be found at the bottom, while the top can be divided into two triangles. The triangle on the left has an area of 18in^2, (1/2*6*6) while the triangle on the right has an area of 9 in^2 (1/2*6*3).
Total area for all three shapes is 45 sq. inches
<span>1. a portion of a large group -> sample
the sample is the part that you select from a population to analyze.
2. choosing a sample so that every member has an equal chance of being chosen -> random sample
in a random sample any member of the group has the same probabilities to be selected.
3. choosing a sample from people who are under 15 years old -> biased sample
when you select based on a characteristic of the group you are running a biased sampling.
4. using the responses of a small group to make conclusions about the large group. -> estimating from a sample
statistics searches to infere information about a large group using the responses from a sample
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