Answer:x=12 and 68$
Step-by-step explanation:
I have no clue what to answer 9
Answer:
m=0
Step-by-step explanation:
it just is as there is no change
Answer:
Null hypothesis: 
Alternative hypothesis: 
The alternative hypothesis for this case is that at least one mean is different from the others.
And the best method for this case is an ANOVA test.
Step-by-step explanation:
For this case we wnat to test if all the mean length of all face-to-face meetings and the mean length of all Zoom meetings are the same. So then the system of hypothesis are:
Null hypothesis: 
Alternative hypothesis: 
The alternative hypothesis for this case is that at least one mean is different from the others.
And the best method for this case is an ANOVA test.
$1100 because 12% of 500 is $60 x 10 is $600 + 500