3 years ago

Can someone help me please?

Mathematics

1 answer:

Olin [163]3 years ago

7 0

Answer:

336km^2

Step-by-step explanation:

There are 2 triangles and 3 squares in this 3D shape.

To find the surface area of this shape, you need to find the area add all the 5 shapes (height ✖️length) and add them.

area of the triangle: 8✖️9/2=36 +36<-- 2nd triangle=72km^2

area of a square: 11✖️8=88✖️3=264km^2

264+72=336km^2

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Answer:

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Step-by-step explanation:

We have a large sample size n = 56 research cotton samples. Besides, $\bar{x} = 8.17$ and $s = 1.42$ . A 95% large-sample CI for the true average percentage elongation is given by $\bar{x}\pm z_{0.05/2}(s/\sqrt{n})$ , i.e., $8.17\pm (1.96)(1.42/\sqrt{56})$ or equivalently (7.7981, 8.5419). The distribution of percentage elongation can be any distribution with finite mean and variance because we have a large sample.