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dlinn [17]
3 years ago
8

in 2010, the continent of south america has a population of 395,280,204. which of the following is the closest estimate of this

number? A 3x10^8 B 4x10^7 C 4x10^8 or D 4x 10^9
Mathematics
1 answer:
grigory [225]3 years ago
6 0

South America is a subcontinent of the Americas located in the Southern, Western ... with a 2013 population estimated at 386,000,000, according to national estimates of ... By far the most populous country in South America is Brazil, which has ... as high as 8% in the case of Argentina, while unemployment remaining but low

but i would say your answer could be D

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Kristen is 64 inches tall, and she stands 12 feet away from a streetlight. If she casts an 82-inch-long shadow, how tall is the
o-na [289]

Answer:

176.39 inches or

14.70 feet

Step-by-step explanation:

Consider the right triangle made by Kristen, ground and shadow.

This triangle has one leg as 64 inches.

Next consider the right triangle formed by street light, ground upto shadow tip.

The two triangles have common angle of elevation and also another angle as 90 degrees.

Hence the two triangles would be similar

Also if A is the angle made by hypotenuse of both triangles with the ground we have

tanx=\frac{64}{82}

This value also equals by bigger triangle as

tanx=\frac{h}{82+12(12)}=\frac{h}{226}

From these two we get

h = height of street light =\frac{226(64)}{82} =176.39

6 0
2 years ago
Share R86,70 in the ratio 2 : 1​
rusak2 [61]

Answer:

2:1

2=5780

1=2890

Step-by-step explanation:

2/2+1=2/3×86,70=5780

1/2+1=1/3×8670=2890

4 0
3 years ago
Determine if each set of ordered pairs represents a function
MatroZZZ [7]
Function:(7,-4), (0,9), (2,-2)
(-6,5),(-5,6), (8,2)
(2,3),(6,-5),(-1,3)
Not a function:(0,3),(0,7),(4,0)
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7 0
3 years ago
During elementary school, Derek received a weekly allowance of $10 for completing all of his chores. These days he receives 50%
FrozenT [24]
Dereks weekly allowance is now $15. 50% of 10 is 5.

10+5=15
5 0
2 years ago
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Find the side AB using the law of sines with the one of the sides 11 and the angles 82 and 44 degrees
Rasek [7]

Answer:

7.7

Step-by-step explanation: We are trying to find side c  or side AB

Using the law of sines formula,

a/sin a= b/sin b c/sin c we can solve for missing side.

We are  given side BC or side a which is 11

We also are given angle A is 82 degrees

Angle C is  44 degrees also.

So let set up a proportion.

11/sin 82= x/sin 44

11/sin 82× sin 44=x

x= 7.7

5 0
2 years ago
Read 2 more answers
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