Answer:
4.4 x 10^9
Step-by-step explanation:
(8.8 x 10^6)(5 x 10^2)
Multiply the 8.8 and 5
8.8 x 5 = 44
Add the powers (don't touch the 10s)
6 + 2 = 8
Right now we have: 44 x 10^8 but this isn't in scientific notation. The decimal must have a SINGLE digit to the left of it; no more no less.
Move the decimal over one place to the left.
44 turns into 4.4
This action adds another power
8 + 1 = 9
Thus our final answer is: 4.4 x 10^9
I think it is D because you have to add seven to the other side and the seven wont be a negative anymore.
Answer:
8.04% to 15.96%
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.
![\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=%5Cpi%20%5Cpm%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
In which
z is the z-score that has a p-value of
.
Suppose that you take a random sample of 259 people leaving a grocery store over the course of a day and find that 12% of these people were overcharged.
This means that ![n = 259, \pi = 0.12](https://tex.z-dn.net/?f=n%20%3D%20259%2C%20%5Cpi%20%3D%200.12)
95% confidence level
So
, z is the value of Z that has a p-value of
, so
.
The lower limit of this interval is:
![\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.12 - 1.96\sqrt{\frac{0.12*0.88}{259}} = 0.0804](https://tex.z-dn.net/?f=%5Cpi%20-%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D%20%3D%200.12%20-%201.96%5Csqrt%7B%5Cfrac%7B0.12%2A0.88%7D%7B259%7D%7D%20%3D%200.0804)
The upper limit of this interval is:
![\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.12 + 1.96\sqrt{\frac{0.12*0.88}{259}} = 0.1596](https://tex.z-dn.net/?f=%5Cpi%20%2B%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D%20%3D%200.12%20%2B%201.96%5Csqrt%7B%5Cfrac%7B0.12%2A0.88%7D%7B259%7D%7D%20%3D%200.1596)
So 8.04% to 15.96%
Answer:
suuurrre vast resvon!!!!!!!!