Answer:
Step-by-step explanation:
Since the population standard deviation , is known, we use the z confidence interval for the mean.
This is given by:
For a 95% confidence interval we use .
It was also given that: , and
Let us substitute the values to get:
<u>Interpretation:</u>
We can say with 95% confidence that the interval between 1463.3 and 1580.7 SAT scores contains the population mean based on the sample 125 SAT scores.
Answer:
D) h = A/2πr - r
Step-by-step explanation:
A = 2πr(r+h)
A = 2πr² + 2πrh
2πrh = A - 2πr²
h = (A-2πr²)/2πr
=A/2πr - 2πr²/2πr
=A/2πr - r
Answer:
Opposite sides are equal in length and opposite angles are equal in measure. To find the area of a parallelogram, multiply the base by the height. The formula is: A = B * H where B is the base, H is the height, and * means multiply.
Step-by-step explanation:
Answer:
2xy - 6x +2y
Step-by-step explanation:
12xy - 10xy = 2xy
5y - 3y = 2y
2xy - 6x + 2y
I think it’s 9.8 not really sure