Answer: > (1st answer choice)
Step-by-step explanation: 0.9 is greater than 0.81
Set up a proportion.
x 5
- = -
5.6 4
4x = 5(5.6)
4x = 28
4x 28
- = -
4 4
x = 7.
Did that help?
Answer: 0.3679
Step-by-step explanation:
The cumulative distribution function for exponential distribution is :-
, where
is the mean of the distribution.
Given : A mean length of waiting time equal
minutes
i.e. Mean number of calls answered in a minute ![\lambda=\dfrac{1}{2.8}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cdfrac%7B1%7D%7B2.8%7D)
Now, the proportion of callers is put on hold longer than 2.8 minutes is given by :_
![P(x>2.8)=1-P(x](https://tex.z-dn.net/?f=P%28x%3E2.8%29%3D1-P%28x%3C2.8%29%5C%5C%5C%5C%3D1-%281-e%5E%7B-%5Cfrac%7B1%7D%7B2.8%7D%5Ctimes2.8%7D%29%5C%5C%5C%5C%3D1-1%2Be%5E%7B-1%7D%5C%5C%5C%5C%3De%5E%7B-1%7D%5C%5C%5C%5C%3D0.367879441171%5Capprox0.3679)
Hence, the proportion of callers is put on hold longer than 2.8 minutes = 0.3679
Answer:
about 0.20
Step-by-step explanation:
The speed, acceleration, and distance satisfy the equation ...
v² = 2ad
So the acceleration is ...
a = v²/(2d) = (6 m/s)²/(2×9 m) = 2 m/s²
If we take the acceleration due to gravity to be 9.8 m/s², the coefficient of kinetic friction is the ratio of these:
k = (2 m/s²)/(9.8 m/s²) ≈ 0.20