The z-score for 5 minutes is found from:


Reference to a normal distribution table shows that the cumulative probability for a z-score of 1.667 is around 0.9522.
Therefore the probability that a conversation lasts for longer than 5 minutes is:
1 - 0.9522 = 0.048 to 3 d.p.
Answer:
a. 
b. 
Step-by-step explanation:
Solving (a):


Required
Determine her savings.



Solving (a):


Required
Determine the price before tax
First, we need to determine her savings



The price before tax is calculated as follows:


27.3%
hope this helps leave a 5-rate and thanks!
Answer:
the answer is 5.6
Step-by-step explanation:
Answer:
Cool!
Step-by-step explanation: