Answer:
a) Therefore 92.64% of customers receive the service for half-price.
b) Therefore it would take 8.52 minutes
Step-by-step explanation:
Given that ime required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution with:
mean (μ) = 15 minutes
Standard deviation (σ) = 3.5 minutes
a) The z score is given by the equation:
Since the service will take no longer than 20 minutes,
Using the probability table to get the probability of the z score
percent of customers receive the service for half-price = P(X < 20) = P(z < 1.43) = 0.9236 = 92.64%
Therefore 92.64% of customers receive the service for half-price.
b) Since the probability is 3% = 0.03, this corresponds with a z score of -1.88
Therefore:
Therefore it would take 8.52 minutes
Answer:
(9, -3)
Step-by-step explanation:
The coordinates of the midpoint are the averages of the coordinates of the endpoints.
For the x coordinates:
3 = (-3 + x) / 2
x = 9
For the y coordinates:
3 = (9 + y) / 2
y = -3
The other endpoint is at (9, -3)
Answer: 3.9 ft
Step-by-step explanation:
From the question, the distance across the window which is 2.5 ft is the diameter. Therefore, radius will be:
= 2.5 / 2
= 1.25 ft
Then, we calculate the circumference of the circle which will be:
= 2πr
= 2 × 3.14 × 1.25
= 7.85 ft
Nite that it's a semi circle, therefore we divide the perimeter by 2. This will be:
= 7.85/2
= 3.9 feet
Answer:
The second company offers better value
Step-by-step explanation:
$17,75 / 6 = ~$2,96
$25 / 8 = ~$3,13
Answer:
12
Step-by-step explanation:
unless placed in an inconvinient way, this is really the one that makes sense.
