Answer:
Option A: 3.59% is the correct answer
Step-by-step explanation:
Z-score is used to calculate the probabilities when mean and standard deviation is given.
Given
Mean = μ = 21
SD = σ = 5
We have to find the probability of selling 12 or less water heaters so our x value is 12
x = 12
The z-score of a value is calculated as:
z-score = (x-μ)/σ
Putting the values
![z-score=\frac{12-21}{5} \\=\frac{-9}{5}\\=-1.8](https://tex.z-dn.net/?f=z-score%3D%5Cfrac%7B12-21%7D%7B5%7D%20%5C%5C%3D%5Cfrac%7B-9%7D%7B5%7D%5C%5C%3D-1.8)
Now z-score table will be used to calculate the probability for z= -1.8
So we will go for the row with -1.8 and column 0, which gives us: 0.03593
As we have to calculate the probability in percentage
![=0.03593*100\\= 3.593\%](https://tex.z-dn.net/?f=%3D0.03593%2A100%5C%5C%3D%203.593%5C%25)
Hence,
Option A: 3.59% is the correct answer
Answer:
about $12 dollars
Step-by-step explanation:
Answer :We see three key obstacles to the economic advancement of micro-entrepreneurs: 1. They lack basic business skills. The management practices of most micro-entrepreneurs are a world away from those taught at leading business schools. They continue to use the set of practices they have seen and used for generations, even though demonstrably better options exis
Answer:
A. 8 gallons
B. Drive by car is $59.4 cheaper than travel by train
Step-by-step explanation:
According to the scenario, given data are as follows,
Total drive = 400 miles
Total drive per gallon = 50 miles
Fuel cost per gallon = $4.45
A. So, Total fuel required to drive 400 miles can be calculated as follows,
Total fuel required = Total drive ÷ Total drive per gallon
By putting value, we get,
Total fuel required = 400 ÷ 50
= 8 gallons
B. Total cost if drive by car = 8 gallons × $4.45 = $35.6
Cost if travel by train = $95
Hence it is clearly shows that drive by car is much cheaper than travel by train.
Cost saved by travel by car = $95 - $35.6 = $59.4
So, drive by car is $59.4 cheaper than travel by train.
The change in altitude for all 6 balloons for 5 minutes = 6 × 1300 = 7800 feet
Step-by-step explanation:
Step 1 :
Number of balloons = 6
Height descended per minute = 260 feet
Total time of descent = 5 minutes
We need to determine the total change in altitude for all the 6 balloons
Step 2 :
The change in altitude for 1 balloon for 1 minute = 260 feet
The change in altitude for 1 balloon for 5 minutes = 5 × 260 = 1300 feet
Therefore
the change in altitude for all 6 balloons for 5 minutes = 6 × 1300 = 7800 feet
Step 3 :
Answer :
The change in altitude for all 6 balloons for 5 minutes = 6 × 1300 = 7800 feet