The formula for finding the Volume of square pyramid is given by :
![V = a^{2} \frac{h}{3}](https://tex.z-dn.net/?f=%20V%20%3D%20a%5E%7B2%7D%20%5Cfrac%7Bh%7D%7B3%7D%20%20%20)
where a is base edge and,
h = height.
We are given in the figure,
base edge = 18cm
Height =12 cm
So plugging these values in the formula for volume , we have
![V = (18)^{2} \frac{12}{3}](https://tex.z-dn.net/?f=%20V%20%3D%20%2818%29%5E%7B2%7D%20%5Cfrac%7B12%7D%7B3%7D%20%20%20)
On solving we get ,
Volume of square pyramid = 1296 cm³.
So first option is the correct choice .
Answer:
480 Boy
Step-by-step explanation:
The ratio of Boys = 4x
The ratio of Girls = 5x
The Number of Boys in the School = 4x + 5x = 1080
= 9x = 1080
= x = 1080/9
= x = 120
The ratio of Boys = 4x = 4 x 120 = 480
The ratio of Girls = 5x = 5 x 120 = 600
Hence, Number of Boys = 480
Ratio Boys to Girls = 480:600
[RevyBreeze]
The standard deviation is 4 games
A standard deviation (or σ) is a measure of how dispersed the facts are in relation to the mean. Low general deviation method statistics are clustered around the imply, and excessive trendy deviation indicates facts are more unfold.
Don't forget the statistics set: 2, 1, 3, 2, four. The mean and the sum of squares of deviations of the observations from the mean will be 2. 4 and 5.2, respectively. as a consequence, the same standard deviation could be √(5.2/5) = 1.01.
In data, the same old deviation is a degree of the quantity of variant or dispersion of a set of values. A low preferred deviation indicates that the values tend to be close to the mean of the set, while a high general deviation shows that the values unfold out over a much broader variety.
Given that,
mean = μ = 18
standard deviation = Σ = 6
n = 2
μ x = μ = 18 games
√ x = Σ / √ = 6
√2 = 4 games
Learn more about standard deviation here brainly.com/question/12402189
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18-15=3
percent of change= amount of change/original amount
=3/15
=0.2
=20% 20% is your answer!!!!