Answer:
You are calculating the constant speed
Answer:
Step-by-step explanation:
Given
See attachment for question
Required
The piece-wise function
From the attachment, we have:
(1) $4/hr for first 2 hours
This is represented as:
The domain is:
(2) $2/hr for next 4 hours
Here, we have:
The total cost in the first 2 hours is:
So, this function is represented as:
----- 2 represents the first 2 hours
So, we have:
Open brackets
Collect like terms
The domain is:
(3) 0 charges for the last 2 hours
The maximum charge from (2) is:
Since there will be no additional charges, then:
And the domain is:
--- 8 represents the limit
So, we have:
Answer:
The 95% CI is (6.93% , 7.47%)
The 99% CI is (6.85% , 7.55%)
Step-by-step explanation:
We have to estimate two confidence intervals (95% and 99%) for the population mean 30-year fixed mortgage rate.
We know that the population standard deviation is 0.7%.
The sample mean is 7.2%. The sample size is n=26.
The z-score for a 95% CI is z=1.96 and for a 99% CI is z=2.58.
The margin of error for a 95% CI is
Then, the upper and lower bounds are:
Then, the 95% CI is
The margin of error for a 99% CI is
Then, the upper and lower bounds are:
Then, the 99% CI is