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3 years ago

9

The area of the continent of North America is about 9,540,000 square miles. Write 9,540,000 in expanded form using exponents to

show powers of 10

1 answer:

pav-90 [236]3 years ago

7 0

9,000,000+500,000+40,000+0,000+000+00+0=9,540,000

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3 years ago

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3 years ago

An Ap is such that 5 th term is three times the 2nd term.given further that the sum of the 5th,6th,7th,8th term is240,calculate

Fiesta28 [93]

Answer:

5

Step-by-step explanation:

The general term of an arithmetic progression is ...

an = a1 +d(n -1)

where a1 is the first term and d is the common difference.

Here we are given that ...

a5 = 3×a2

a5 +a6 +a7 +a8 = 240

__

In terms of a1 and d, these tell us ...

a1 +d(5 -1) = 3(a1 +d(2 -1))

a1 +4d = 3a1 +3d . . . . . eliminate parentheses

d = 2a1 . . . . . . . . . . . subtract a1+3d

and ...

(a1 +4d) +(a1 +5d) +(a1 +6d) +(a1 +7d) = 240

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Substituting for d, we have ...

4a1 +22(2a1) = 240

48a1 = 240

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3 years ago