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Serggg [28]
2 years ago
15

BRAINLIEST IF CORRECT Historians estimate that there were about 7 million people on earth in 4,000 BCE. Now there are about 7 bi

llion! We write 7 million as 7,000,000. We write 7 billion as 7,000,000,000. How many times more people are there on the earth now than there were in 4,000 BCE? (BCE mean before common era it dosent really matter though
Mathematics
1 answer:
tamaranim1 [39]2 years ago
7 0

Answer:

100 times more

Step-by-step explanation:

if you multiply 7,000,000 by 1000 you get 7,000,000,000

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Can you please factor this x^8-7x^4+12
SashulF [63]
Lol yes I can factor that. x^{4} -3)(x^{4}-4) But, this can be factored further. ( x^{2} -2)( x^{2} +2)( x^{4}-3)
3 0
3 years ago
Weather
Crank

Answer:

It snowed for 6 days in November

Step-by-step explanation:

Since there are 30 days in November

and 20 goes into 100 five times,

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5 0
2 years ago
What is the perimeter , in feet , of the polygon 15,22,10,18,14,5,5,16
Alinara [238K]
You just add all the sides together for perimeter
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5 0
3 years ago
(6ab-8a+8) - (7ab-1 )
PSYCHO15rus [73]

Answer:

- ab - 8a + 9

Step-by-step explanation:

(6ab - 8a + 8) - (7ab - 1) \\ 6ab - 8a + 8 - 7ab + 1 \\  - ab - 8a + 9

hope this helps you.

4 0
2 years ago
Read 2 more answers
how do you solve this problem. there are approximately 2.1 million deaths per year in country A. Express this quantity as deaths
slamgirl [31]
Well... we know that... there are 365 days in a year, unless is a leap-year, but we'll use 365 anyway

and each day has 24hrs, each hr has 60 minutes

so. let us use those ratios

\bf 2.1million\iff 2.1E6\iff 2,100,000\qquad thus
\\\\\\
\cfrac{2100000\ deaths}{1\ year}\cdot \cfrac{1\ year}{365\ day}\cdot \cfrac{1\ day}{24\ hr}\cdot \cfrac{1\ hr}{60\ minute}

so.. multiply and simplify, cancelling out any like-units atop and bottom

notice, all we do, is use the ratios, in a way, that if we need one unit to be changed, we flip the ratio

for example, to toss away "year" unit, since in the first fraction is at the bottom, then we put it on the top on the ratio, year/year  = 1, effectively cancelling the unit
5 0
3 years ago
Read 2 more answers
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