120×80=9600 perimeter
less or equal to 9600
Answer: Option D.
Step-by-step explanation:
A figure has a line of symmetry if we can draw a line through the figure, in such way that the line cuts the figure in exactly two equal halves.
Then any figure that can be cutin exactly two halves, is a correct answer to this question.
Then:
For a circle, the line of symmetry is the diameter of the circle.
For the square, the line of symmetry can be obtained by cutting the square with a line that is perpendicular to one of the sides, and cuts that side exactly on the midpoint.
For an equilateral triangle, the line of symmetry is the line that cuts any base in the midpoint and also passes through the opposite vertex.
Then all the figures are correct options, then the correct option is D
Answer:
0.7
Step-by-step explanation:
Answer:
The relative growth rate is 18.75%.
Step-by-step explanation:
If the world population was 2.560 million in 1950 and 3.040 million in 1960, it means that there was a growth of 480 million people in 10 years. Thus, it is a growth of 18.75%, according to the following calculation:
2,560 = 100
480 = X
(480 x 100) / 2,560 = X
48,000 / 2,560 = X
18.75 = X
Therefore, if this growth rate were to be maintained, in subsequent years the world population would evolve as follows:
1970: 3,040 x 1.1875 = 3,610 million inhabitants
1980: 3,610 x 1.1875 = 4,286 million inhabitants
1990: 4,286.8 x 1.1875 = 5,090 million inhabitants
