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lora16 [44]
3 years ago
8

In 2010, the continent of South America had a population of 395, 280, 204 Which of the following is the closest estimate of this

number?
O 3 x 10^8
O 4 x 10^7
O 4 x 10^8
O 4x 10^9
Mathematics
1 answer:
lesya [120]3 years ago
6 0

Given:

The population of continent of South America in 2010 is 395, 280, 204.

To find:

The closest estimate of this number.

Solution:

We have,

Population = 395, 280, 204

The approximate value of this number is

Population \approx 400, 000, 000

The scientific form of this value is

Population = 4\times 10^8

Therefore, the correct option is C.

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3 years ago
Consider this figure of a hexagon.
notsponge [240]
A)
It looks like the [irregular] hexagon has 3 rectangles and 2 triangles within it.
So let's exclude the triangular corners on bottom left and top right for now.
First we have a large rectangle covering most of the upper left of the polygon. 20 ft × 7 ft = 140 sq.ft.
Now we have a rectangle on the bottom right. The width is 11 ft, so take the 7 away from that, 4 ft. × 14 ft. on bottom. 4 ft × 14 ft = 56 sq.ft.
The last small rectangle fits on the right between the 2 other rectangles. It is 24-20 on top/bottom × 7-6 right/left. 4 ft × 1 ft = 4 sq.ft.
Now for the triangles: bottom left is 11-7 × 24-14 = 4 ft × 10 ft. 1/2bh = 1/2×10×4 = 20 sq.ft.
Top right is 24-20 × 11-5 = 4 ft × 6 ft. 1/2bh = 1/2×4×6 = 12 sq.ft.

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6 0
3 years ago
Read 2 more answers
Write an equation and solve this problem: Seventy is what percent of 50?
MrRissso [65]
70 = 50 * x/100
x = 70/50*100 = 140

Seventh is 140% of 50.
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