Answer:
B
Step-by-step explanation:
obtuse
Answer:
I would say A. 7.8 x 10^-5
Step-by-step explanation:
7.8 x 10^-5 can also be written as 7.8 times 10 to the negative fifth power or the exponent of negative five. But, if you solve it you would get 0.000078 as the real number.
Answer:
The 98% confidence interval for the mean is (8.84, 18.96).
Step-by-step explanation:
We have to calculate a 98% confidence interval for the mean.
The sample 1, of size n1=11 has a mean of 77.5 and a standard deviation of 4.5.
The sample 1, of size n1=9 has a mean of 63.6 and a standard deviation of 5.1.
The difference between sample means is Md=.
The estimated standard error of the difference between means is computed using the formula:
The t-value for a 98% confidence interval is t=2.326.
The margin of error (MOE) can be calculated as:
Then, the lower and upper bounds of the confidence interval are:
The 98% confidence interval for the mean is (8.84, 18.96).
Given:
The vertices of the rectangle ABCD are A(0,1), B(2,4), C(6,0), D(4,-3).
To find:
The area of the rectangle.
Solution:
Distance formula:
Using the distance formula, we get
Similarly,
Now, the length of the rectangle is and the width of the rectangle is . So, the area of the rectangle is:
Therefore, the area of the rectangle is 20 square units.