40√3+432/7 is the answer
Hope this helps :D
Answer: 11.5%
Explanation:Since 1 minute = 60 seconds, we multiply 12 minutes by 60 so that 12 minutes = 720 seconds. Thus, we're looking for a probability that the auditor will spend more than 720 seconds.
Now, we get the z-score for 720 seconds by the following formula:

where

So, the z-score of 720 seconds is given by:

Let
t = time for the auditor to finish his work
z = z-score of time t
Since the time is normally distributed, the probability for t > 720 is the same as the probability for z > 1.2. In terms of equation:

Hence, there is
11.5% chance that the auditor will spend more than 12 minutes in an invoice.
2.
0.05 miles
3.
a
4.
a
5.
1 Book for ever 10$
6.
28 MPH
Thats it!
Hope this helps
Answer:
Computer disks are $4 each
Notebooks are $3 each
Step-by-step explanation:
For the first equation
<em>$4 x 2 disks = $8</em>
<em>$3 x 3 notebooks = $9</em>
<em>$9 + $8 = </em>$17
For the second equation
<em>$4 x 5 disks = $20</em>
<em>$3 x 4 notebooks = $12</em>
<em>$20 + $12 = </em>$32