Answer:
A = 3.14 yd^2
Step-by-step explanation:
The circumference is given by
C = 2 * pi * r
Letting pi be approximated by 3.14
6.28 = 2 * (3.14) *r
6.28 = 6.28 r
Divide each side by 6.28
6.28/6.28 = 6.28r/6.28
1=r
We can find the area by
A = pi r^2
A = 3.14 (1)^2
A = 3.14
Answer: The average age is 7.1 years.
This problem is an example of when we need to take a weighted average. We simply can't just find the average of 5 and 8, because there are different children of each each.
To start, lets multiply the total number of children by their individual ages.
6 x 5 = 30 years
14 x 8 = 112 years
There are 142 years among the 20 years, so divide 142 by 20. This gives us an average age of 7.1 years.
The window that has the shape of a kite has the area of the glass as 648 centimetre squared.
<h3>What is area of a figure?</h3>
Area can be defined as the space occupied by a flat shape or the surface of an object. Therefore,
The window is the shape of a kite. Therefore, the square meters of the glass used for the window is the area of the window(kite).
Therefore,
area of kite = ab / 2
where
- a and b are the length of the diagonal
Therefore,
a = 18 + 18 = 36 cm
b = 15 + 21 = 36 cm
area of the window = 36 × 36 / 2 = 1296 / 2 = 648 cm²
learn more on area here:brainly.com/question/2494000
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