Answer:
Option B
Step-by-step explanation:
Formula to be used to calculate the length of an arc,
Length of arc =
Here, θ = Angle subtended at the center by the arc
r = radius of the circle
By substituting values in the formula,
s =
Therefore, Option B will be the answer.
<u>Answer</u>: No, we do not have sufficient evidence to conclude that the mean call duration, µ, is different from the 2010 mean of 9.4 minutes.
Step-by-step explanation:
As per given , we have
, since is two-tailed so , the test is a two tail test.
Since population standard deviation is unknown, so we use t-test.
Critical value (two-tailed) for significance level of 0.01=
For n =50 , and s= 4.8
Test statistic :
Since test statistic value (-1.18) lies in critical interval (-2.609228, 2.609228), it means the null hypothesis is failed to reject.
We do not have sufficient evidence to conclude that the mean call duration, µ, is different from the 2010 mean of 9.4 minutes.
If 1/3 of all his buttons is 3 buttons, than 3/3 is 9
Answer: $82,000
Step-by-step explanation:
4000 multiplied by 9 equals $36000. Add 36000 to 46000 and you get $82000.
The answer for your problem is gonna be 7000