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fomenos
3 years ago
14

Number25 it says thirty cubes were used to construct this 3 step staircase how many cubes would be used to construct a 10 step s

taircase of the same width

Mathematics
2 answers:
N76 [4]3 years ago
6 0
The answer to your question is 275 cubes
GaryK [48]3 years ago
3 0
This can be represented by the sequence  5 , 10 , 15 ......
- Arithmetic sequence with common difference 5

The sum of  n terms = (n/2) [2a1 + (n - 1)d]

S10  = (10/2)[2*5 + (10-1)*5]
         = 5 * (10 + 45) 
         = 5 * 55
         =  275 
So the answer is 275 cubes
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Answer:

10×4 = 40

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Step-by-step explanation:

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<em>Comment on the answer choice</em>

The appropriate answer depends on what you mean by your problem statement. Some microscopes magnify 40 times; others magnify 10,000 times, so we cannot tell the appropriate answer using our knowledge of microscopes.

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