<span>According to Ptolemic Model the Earth was considered to be at the center of Earth. All the planets, stars and moons were thought to be revolving around the Earth will be doing so in epicycles. The epicycles are spiral movement in which movement is given while forming circles and center in orbits around the Earth</span>
Answer:
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The answer is A) biosphere.
Answer:
15 would be 40 16 would be 41 17 would be 42 18 would be 43 19 would be 46
Explanation:
Given:
Similar triangles ABC and PQR with AB = 4 and PQ = 7.
To find:
The scale factor, ratio of perimeters, and ratio of areas.
Solution:
In similar figures the scale factor is the ratio of side or image and corresponding side of original figure.
In similar triangles ABC and PQR, the scale factor is


The scale factor of triangle ABC to triangle PQR is
.
The ratio of the perimeters of similar triangles is equal to the ratio of their corresponding sides.



The ratio of the perimeters is 4:7.
The ratio of the areas of similar triangles is equal to the ratio of squares of their corresponding sides.




Therefore, the ratio of the areas is 16:49.