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seraphim [82]
3 years ago
14

What is the sum of 20 consecutive numbers, if the first one is m?

Mathematics
1 answer:
sveta [45]3 years ago
7 0

Answer:

20m+189

Step-by-step explanation:

Firstly I let the numbers be m,m+1,m+2......m+19. Then I added all the numbers and put variables and constant at different portions and added all variables which were 20(m) and all constant were equal to 189...so the answer is 20m+189

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Step-by-step explanation:

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Answer:

18 minutes

Step-by-step explanation:

A = A₀ (½)^(t / T)

where A is the final amount,

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A = 140 when t = 10.  Solve for the half life:

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Answer:

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