Answers:
a) 0.091
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 140 minutes
Standard Deviation, σ = 15 minutes
We are given that the distribution of time watching videos is a bell shaped distribution that is a normal distribution.
Formula:
a) P(time is less than 120 minutes)
Calculating the value from the standard normal table we have,
The probability that an 18- to 24-year-old spends less than 120 minutes watching video on his or her smartphone per month is 0.091
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Answer:
FJ = 24
DM = 16
EM = 18
Step-by-step explanation:
I remember that the centroid is 2/3 of the distance from each vertex to the midpoint of the opposite side. Therefore the median is split into two parts where one side is always twice as long as the other. So given that segment ML is 8, the other part of the segment (DM) must be 16 as 16 is 2/3 of 24 and 8 is 1/3 of 24 and 1/3 + 2/3 = 1.
Therefore, since MJ is 8, FM must be twice as long so it is 16. Add them up to get FJ, and 8 + 16 is 24.
Finally for EM, since the longer part of the median is twice the length of the smaller part EM must be 18 since 9 × 2 = 18, and 2/3 of 18 is 27, 9 + 18 = 27.
Answer:
natural number belongs to set N
integer belongs to set Z
rational number belongs to set Q
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