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My name is Ann [436]
4 years ago
10

Question 8 of 14

Mathematics
2 answers:
diamong [38]4 years ago
7 0

Answer:

144.

Step-by-step explanation:

Sum of n terms = (n/2)[a1 + l]    where a1 = first and l = last term.

There are ( 1 + 23) / 2 = 12 terms in this series.

So  the sum = (12/2) [ 1 + 23]

= 6 * 24

= 144.

Oxana [17]4 years ago
3 0

Answer:

276 is correct

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Step-by-step explanation:

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The pages of a book are numbered 1 to 200 and each leaf is 0.15 mm thick. If each cover is 2.5 mm thick, calculate the thickness
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▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

Thickness of the book is ~

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2 years ago
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4 years ago
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