Answer:
An even number
Step-by-step explanation:
Integers which are multiples of 2, are even numbers.
Integers which aren't multiples of 2, are odd numbers.
As integers can be positive and negative both, odd and even numbers also can be positive and negative.
I believe a would be on the first line.
It should be f since you can subtract from both sides and divide by negative 1
SOLUTION
The mean is 4min
standard deviation is 1min
the z score is
where
then we have
The probability the call lasted less than 3 min will be
Therefore, the probability that (z < -1 ) is
[tex]\begin{gathered} Pr(z<-1)=Pr(0
Hence, the percentage of the calls that lasted less than 3 min is 16%
2300 out of 4500 were chosen
2300 / 4500 = 0.5111
0.51 = 51%
51% is the acceptance rate.