Answer:
$9.90
Step-by-step explanation: I DID THE WORK. SIMPLE
z-score of a company is 5.
What is z- test?
A z-test is a statistical test used to determine whether two population means are different when the variances are known and the sample size is large.
The annual salaries of all employees at a financial company are normally distributed with a mean of $34,000 and a standard deviation of $4,000.
Now, using z- score
z= (x-
)/
z= 54000- 34000/ 4000
z= 20000/4000
z=5.
Hence, z-score of a company is 5.
Learn more about this concept here:
brainly.com/question/1546834
#SPJ1
Answer: 
Step-by-Step Explanation:
Let's solve for
.

Step 1: Multiply both sides by
.

Step 2: Multiply both sides by
.

Step 3: Add
to both sides.


Step 4: Add
to both sides.


Step 5: Add
to both sides.


Step 6: Factor out variable
.

Step 7: Divide both sides by
.


Answer:

There are 7 faces, 12 edges and 24 vertices in a hexagonal pyramid.