Answer:
The 90% confidence interval estimate of the mean annual income of all company presidents is ($579,545, $590,580).
Step-by-step explanation:
The information provided is:

The critical value of <em>z</em> for 90% confidence level is, 1.645.
Compute the 90% confidence interval estimate of the mean annual income of all company presidents as follows:

Thus, the 90% confidence interval estimate of the mean annual income of all company presidents is ($579,545, $590,580).
This interval implies that there is 90% probability that the true mean annual income of all company presidents is within this interval.
-12
lmk if you want me to explain
Answer:
4x+y=34
Step-by-step explanation:
Linear equations can be written in 3 forms:
slope-intercept form
standard form
point-slope form
standard form's formula is ax+by=c,
now sub in 34 for c and 4 for a
4x+by=34
we can put in 1 for b since there is no other integers
4x+y=34
Answer: Total distance travelled is 510 km
Step-by-step explanation:
it is given that an automobile travels for
2 hours at 80km/h
3 hours at 110km/h
30 min at 40km/h
to find distance=x(let)
since
distance = speed * time
so
x= 80*2 +110*3 +40*(1/2) [since 1 hour =60 min so 30 min =1/2 hour]
x=160+330+20
x=510
hence total distance travelled is 510 km
Learn more about kinematics here
brainly.com/question/28493318
#SPJ9