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gayaneshka [121]
3 years ago
5

Please help with this math question thanks!!!

Mathematics
2 answers:
tatyana61 [14]3 years ago
7 0
Answer: 61.5 square feet.

Explanation:

The surface area of all the figure is the sum of the areas of each plane:

1) Bottom: length * width = 7.5 ft * 1.5 ft = 11.25 ft^2

2) Front view: 7.5 ft * 1.5 ft + 2.5 ft * 1.5 ft = 11.25 ft^2 + 3.75 ft^2 = 15 ft^2

3) Back side = front = 15 ft^2

4) Top surfaces: 3 * 2.5 ft * 1.5ft = 11.25 ft^2

5) laterals = 4 * 1.5 ft * 1.5 ft = 9 ft^2

6) Total = sum = 11.25 ft^2 + 15 ft^2 + 15 ft^2 + 11.25 ft^2 + 9 ft^2 = 61.5 ft^2

Answer: 61.5 ft^2
melisa1 [442]3 years ago
5 0
The surface area is
A1=7.5*1.5*2=22.5 ft2 top and bottom view
A2=3*1.5*2=9 ft2 laterals view
A3=(7.5*1.5+2.5*1.5)*2=30 ft2  front and rear view

At=22.5+9+30=61.5 ft2
the answer is 61.5 ft2
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Nataliya [291]

Answer:

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Step-by-step explanation:

The complete question is:

Use a t-distribution to answer this question. Assume the samples are random samples from distributions that are reasonably normally distributed, and that a t-statistic will be used for inference about the difference in sample means. State the degrees of freedom used. Find the proportion in a t-distribution less than -1.4  if the samples have sizes 1 = 12 and n 2 = 12 . Enter the exact answer for the degrees of freedom and round your answer for the area to three decimal places. degrees of freedom = Enter your answer; degrees of freedom proportion = Enter your answer; proportion

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The information provided is:

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\text{df}=\text{Min}.(n_{1}-1,\ n_{2}-1)

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*Use a <em>t</em>-table.

Thus, the proportion in a t-distribution less than -1.4 is 0.095.

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