Answer:
∑(1+8n)
Step-by-step explanation:
Given:
series : 9+17+25+...
As first term= 9
for n=1, expression should comes out to be 9
for 2+7n:
2+7(1)=9
for (n+8)
1+8=9
for (1+8n)
1+8(1)=9
all is true
now for n=2, the expression's outcome be 17
for 2+7n:
2+7(2)=16
comes wrong
for (n+8)
2+8=10
comes wrong
for (1+8n)
1+8(2)=17
come right
Also for n=3, (1+8(3))=25
Hence correct expression is ∑(1+8n) !
Since a square has four sides you divide 215 by 4 your answer will be 53.75
Each side 53.75 long
Answer:
Between 19.3 and 55.9 animals.
Step-by-step explanation:
Chebyshev Theorem
The Chebyshev Theorem can also be applied to non-normal distribution. It states that:
At least 75% of the measures are within 2 standard deviations of the mean.
At least 89% of the measures are within 3 standard deviations of the mean.
An in general terms, the percentage of measures within k standard deviations of the mean is given by .
In this question:
Mean of 37.6, standard deviation of 6.1.
Between what two numbers of animals does Chebyshev's Theorem guarantees that we will find at least 89% of the days?
Within 3 standard deviations of the mean, so:
37.6 - 3*6.1 = 19.3
37.6 + 3*6.1 = 55.9
Between 19.3 and 55.9 animals.
Answer: 4th option
Explanation:
Cuz angle 8 + angle 7 = 180 degree (supplementary)
It create a straight line.