Answer:
The 99% confidence interval for the mean commute time of all commuters in Washington D.C. area is (22.35, 33.59).
Step-by-step explanation:
The (1 - <em>α</em>) % confidence interval for population mean (<em>μ</em>) is:
Here the population standard deviation (σ) is not provided. So the confidence interval would be computed using the <em>t</em>-distribution.
The (1 - <em>α</em>) % confidence interval for population mean (<em>μ</em>) using the <em>t</em>-distribution is:
Given:
*Use the <em>t</em>-table for the critical value.
Compute the 99% confidence interval as follows:
Thus, the 99% confidence interval for the mean commute time of all commuters in Washington D.C. area is (22.35, 33.59).
Suppose we have a generic polynomial of the form:
To know how many roots the polynomial can have, the first thing you should do is observe the term of greatest exponent.
For this case, the term of greatest exponent is 2.
Therefore, the polynomial has 2 roots.
Answer:
You must observe the term of the polynomial with greater exponent.
Answer:
22
Step-by-step explanation:
Use the trapezoid area formula.
A = (b1 + b2) / 2 * h
Plug in the values.
A = 3 + 8 / 2 * 4
A = 11 / 2 * 4
A = 44/2
A = 22
Answer:
0.25 oz in 20 years
Step-by-step explanation:
Half life means its half decayed in the
the amount cuts in half every 4 year
8 oz at the start
4 oz after 4 years
2 oz after 8 years
1 oz after 12 years
0.5 oz after 16 years
0.25 oz in 20 years
Answer:
x < 6
Step-by-step explanation:
It has to be a number lower than 6, because 6+6 is 12 and that creates a balanced system.
It cant be a number higher than 6, because it will drag itself down.
So we need a number that when combined, it's sum will be lower than 12
