Answer: 0.866
Step-by-step explanation:
Mean = 4022
SD = 266
We are looking for the probability of samples 45g differ than the mean. Hence 2 probability combination:
X>4067 and X<3977
Calculate for Z we'll get Z = 0.16917 and -0.161917
Using Z formula we can find P(Z=0.17) = 0.433
Since both probability will occupy the same area, total probability is 0.433x2 = 0.866
Answer:
$200
Step-by-step explanation:
Here is the full question
You can upgrade lighting at your factory to LED bulbs that cost $6.95 each and last an average of 5 years. It costs $3 in labor to change a bulb. Over a 10-year period, about how much will it cost per year to install LED bulbs in 100 lamps and change the bulbs when they burn out?
in 10 years, the bulbs would be changed twice
Total cost incurred per bulb in 10 years = (6.95 + $3) x 2 = $19.90
Since there are 100 bulbs, total cost incurred would be - $19.90 x 100 = $1990
Cost per year = $1990 / (6.95 + $3) = $200
Answer:
9:00 P.M.
Step-by-step explanation:
All 3 bells ring at 9AM
1st bell: every 2 hours:
9AM, 11AM, 1PM, 3PM, 5PM, 7PM, 9PM
2nd bell: very 3 hours:
9AM, 12AM, 3PM, 6PM, 9PM
3rd bell: every 4 hours:
9AM, 1PM, 5PM, 9PM
So All 3 bells will ring at 9PM again
6√25, ∛27, √64, ∛64
6*5, 3, 8, 4
30, 3, 8, 4
∛64 > ∛27> √ 64 > 6√25
