When Jim surveyed 5 sixth-grade students at the community skating rink, he found that only 1 out of the 5 had completed the science project. He knows there are about 160 sixth-grade students in his community, so he infers that around 32 students have finished their science project. Is this a good inference? No, Jim did not make a good inference because his sample is too small and may be biased because he only asked students that were at the rink.
No, Jim did not make a good inference because his sample is too small and 32 is not in the same proportion to the population as 1 to 5.
Yes, Jim made a good inference because 32 is the same proportion to the population as 1 to 5.
Yes, Jim made a good inference because most students at the rink were sixth graders.

Solved

Show answers

Ответ:

AliMe52

13.05.2021

Mathematics

image is missing in the question. refer to the attached image.

this question is based on concept of volume of solid figures.

volume of oblique prism is given by =base area $\times$ height

since an oblique prism has trapezoidal bases.

so, area of trapezoid = $\frac{1}{2} \times h (a+b)$

since height of trapezoid, h=x , a=x and b=2x

therefore,

area = $\frac{1}{2} \times x (x+2x)$

area = $\frac{1}{2} \times 3x^{2}$

given that the vertical height of the prism is 10 units.

so, the volume of prism = base area $\times$ height

$=\frac{1}{2} \times 3 \times x^{2} \times 10$

= $15 x^{2}$ cubic units.

therefore, option 2 is the correct answer.

0,0(0 оценок)

Ask your question to the AI advisor

Ai-bot is an expert in any field and is the perfect companion for reliable and useful answers and advice on a variety of topics, including science, history, technology, art, sports, health, culture and more.

Ask your question

More tips

Answers on questions: Mathematics

Ask an AI advisor a question

I want advice