You would keep the 2 hour for the whole number of the mixed number and then, make the minutes (15) as a fraction with 60, and divide them both by 20. that is just for the mixed number.
Answer:
x 100 = 80%
Step-by-step explanation:
Answer: 25
Step-by-step explanation: 5x5 = 25
plz mark branilyest
Answer: . a. 36.08 to 78.80
Step-by-step explanation:
The confidence interval for population standard deviation is given by :-

Given : Sample size = 
Significance level : 
Using the chi-square distribution table , the critical values would be :-


Then , a 99% confidence interval for the population standard deviation will be :-

<span>The answer is $9.75 hope i helped!!</span>