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11Alexandr11 [23.1K]
3 years ago
10

Alexis uses toy blocks to build a model of a building. Each toy block is 1 cubic inch. The first three floors of the model are m

ade up of 6 rows of 4 blocks. Floors four through eight are made up of 4 rows of 4 blocks. What is the volume of the model?
A: 104 cu in.
B: 152 cu in.
C. 88 cu in.
D: 136 cu in.

Please show or explain the working process, thanks. :)
Mathematics
1 answer:
SIZIF [17.4K]3 years ago
6 0

Answer:

For the 6 rows of 4 blocks the answer is 24, for the 4 rows of 4 blocks the answer is 16. Then you do 24x16.

Step-by-step explanation:

6 rows of 4 blocks = 6x4=24

4 rows of 4 blocks= 4x4=16

24

x16

___

124

+ 240

_____

 364

So, your answer would be 346 cu in.!! Sorry if I'm wrong!! :(

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Leya [2.2K]

Answer:  

Option B) Fail to reject the null hypothesis that the true population mean annual salary of full-time college professors in the region is equal to $127,000.                

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ =  $127,000

Sample mean, \bar{x} = $126,092

Sample size, n = 160

Alpha, α = 0.10

Sample standard deviation, σ = $8,509

First, we design the null and the alternate hypothesis

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We use Two-tailed t test to perform this hypothesis.

Formula:

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Since,                  

The calculated t-statistic lies in the acceptance region, we fail to reject and accept the null hypothesis.

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7 0
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