3 and 4/9 would be the answer to this.
Answer: 34%
Step-by-step explanation:
Given : The distribution of the number of daily requests is bell-shaped and has a
and
.
We can see that 41 = 35+6 , it 41 is one standard deviation from mean in the right side . (1)
According to the 68-95-99.7% rule, 68% of the population falls within 1 standard deviation from the mean.
34% (half of 68%) of the population on right side and 34% population on the left side of the density curve. (2)
From (1) and (2), the approximate percentage of light bulb replacement requests numbering between 35 and 41= 34%
Answer:
9.110° and y are the same(alternate angles)
thus y=110°. 110+x=180(seplementary angles). thus x=180-110=70°
z(alternate)=70°
10.y=78°. x=(180-78)=102°. z=102°
11.x=83°. y=(180-83)=97°. z=97°
12.y=37°. x=(180-37)=143. z=143°
<em>to</em><em> </em><em>confirm</em><em> </em><em>the</em><em> </em><em>answers</em><em> </em><em>all</em><em> </em><em>angles</em><em> </em><em>in</em><em> </em><em>a</em><em> </em><em>circle</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>centre</em><em> </em><em>add</em><em> </em><em>up</em><em> </em><em>to</em><em> </em><em>3</em><em>6</em><em>0</em><em>°</em>
The answer is D, pi is irrational
You can look for some proofs on the internet