0.0641 this is the answer
Answer:
Water is leaving at 17500m^3 per minute
Step-by-step explanation:
Given
Required
The rate when time is 5 minutes
We have:
Open bracket
Differentiate
At 5 minutes, we have:
<em>This means that water is leaving at 17500m^3 per minute</em>
Answer:
Where and
We select a sample size of n =8. Since the distribution for X is normal then we know that the distribution for the sample mean is given by:
And the standard error would be:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
Solution to the problem
Let X the random variable that represent the compressive strength of concrete of a population, and for this case we know the distribution for X is given by:
Where and
We select a sample size of n =8. Since the distribution for X is normal then we know that the distribution for the sample mean is given by:
And the standard error would be:
Answer: 38 think
Step-by-step explanation:
For this case we have the following equations:
x + y = 3
y = 2x - 15
Whose solution is given by:
x = 6
y = -3
Or equivalently the ordered pair:
(x, y) = (6, -3)
Answer:
(x, y) = (6, -3)
See attached image