Answer:
Sample size should be atleast 55320
Step-by-step explanation:
Given that a group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week.
population standard deviation ![\sigma = 6 hrs](https://tex.z-dn.net/?f=%5Csigma%20%3D%206%20hrs)
Std error = ![\frac{6}{\sqrt{n} }](https://tex.z-dn.net/?f=%5Cfrac%7B6%7D%7B%5Csqrt%7Bn%7D%20%7D)
Margin of error for 95%
= ![1.96*\frac{6}{\sqrt{n} } 235.2\\n \geq 55319.04](https://tex.z-dn.net/?f=1.96%2A%5Cfrac%7B6%7D%7B%5Csqrt%7Bn%7D%20%7D%20%3C0.5%5C%5C%5Csqrt%7Bn%7D%20%3E235.2%5C%5Cn%20%5Cgeq%2055319.04)
Since sample size is number of items it cannot be indecimal.
So we can round off to the next high integer on a safer side.
9514 1404 393
Answer:
5/2
Step-by-step explanation:
The rules of exponents apply.
a^-b = 1/a^b
(a^b)^c = a^(bc)
a^(1/2) = √a
__
![\left(\dfrac{4}{25}\right)^{-\frac{1}{2}}=4^{-\frac{1}{2}}(25^{-1})^{-\frac{1}{2}}=(2^2)^{-\frac{1}{2}}((5^2)^{-1})^{-\frac{1}{2}}=2^{-1}\cdot5^1=\boxed{\dfrac{5}{2}}](https://tex.z-dn.net/?f=%5Cleft%28%5Cdfrac%7B4%7D%7B25%7D%5Cright%29%5E%7B-%5Cfrac%7B1%7D%7B2%7D%7D%3D4%5E%7B-%5Cfrac%7B1%7D%7B2%7D%7D%2825%5E%7B-1%7D%29%5E%7B-%5Cfrac%7B1%7D%7B2%7D%7D%3D%282%5E2%29%5E%7B-%5Cfrac%7B1%7D%7B2%7D%7D%28%285%5E2%29%5E%7B-1%7D%29%5E%7B-%5Cfrac%7B1%7D%7B2%7D%7D%3D2%5E%7B-1%7D%5Ccdot5%5E1%3D%5Cboxed%7B%5Cdfrac%7B5%7D%7B2%7D%7D)
Alternatively, ...
![\left(\dfrac{4}{25}\right)^{-\frac{1}{2}}=\sqrt{\left(\dfrac{4}{25}\right)^{-1}}=\sqrt{\dfrac{25}{4}}=\dfrac{\sqrt{25}}{\sqrt{4}}=\boxed{\dfrac{5}{2}}](https://tex.z-dn.net/?f=%5Cleft%28%5Cdfrac%7B4%7D%7B25%7D%5Cright%29%5E%7B-%5Cfrac%7B1%7D%7B2%7D%7D%3D%5Csqrt%7B%5Cleft%28%5Cdfrac%7B4%7D%7B25%7D%5Cright%29%5E%7B-1%7D%7D%3D%5Csqrt%7B%5Cdfrac%7B25%7D%7B4%7D%7D%3D%5Cdfrac%7B%5Csqrt%7B25%7D%7D%7B%5Csqrt%7B4%7D%7D%3D%5Cboxed%7B%5Cdfrac%7B5%7D%7B2%7D%7D)
Answer:
B) answer choice H because of the money she's earning and it's going up.
Step-by-step explanation:
If u look closely at the graphs on answer choice G you'll see that it's going up and technically it's a multiplication problem.
Hope I helped
your pal, Star
Take into account that x represents the number of decades after 1950. Moreover, consider that -0.5x is a decrease in the values of y, each decade.
Then, you can conclude that each decade, that is, every 10 years, the shoreline reduces 0.5 feet.
Hnece, you have:
The shoreline is reduced by 0.5 foot every 10 years
Answers:
A
Step-by-step explanation: