Answer:
24 hours
Step-by-step explanation:
4 people can do the work in 6 hours
4*6 = 24 work hours
It will take 1 person 24 work hours to complete the job
Answer:
- ![\frac{\sqrt{2+\sqrt{3} } }{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B2%2B%5Csqrt%7B3%7D%20%7D%20%7D%7B2%7D)
Step-by-step explanation:
using the half angle formula
cos(
) = ± ![\sqrt{\frac{1+cosx}{2} }](https://tex.z-dn.net/?f=%5Csqrt%7B%5Cfrac%7B1%2Bcosx%7D%7B2%7D%20%7D)
cos195° = cos(180 + 15)° = - cos15°
then
cos15° = cos (
) =
=
=
= ![\frac{\sqrt{2+\sqrt{3} } }{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B2%2B%5Csqrt%7B3%7D%20%7D%20%7D%7B2%7D)
then
cos195° = - cos15° = - ![\frac{\sqrt{2+\sqrt{3} } }{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B2%2B%5Csqrt%7B3%7D%20%7D%20%7D%7B2%7D)
X=-53x+378, if you need explanation used ask me.
If the standard deviation is 9 and sample size is 100 then the standard error is 0.9.
Given that the mean is 80,standard deviation be 9 and sample size be 100.
We are required to find the standard error of the given data.
The standard error of a statistic is basically the standard deviation of its sampling distribution or an estimate of that standard deviation.
Standard error=σ/![\sqrt{n}](https://tex.z-dn.net/?f=%5Csqrt%7Bn%7D)
in which σ is standard deviation and n is sample size.
Here standard deviation is 9 and sample size is 100.
Standard deviation=9/![\sqrt{100}](https://tex.z-dn.net/?f=%5Csqrt%7B100%7D)
=9/10
=0.9
Hence if the standard deviation is 9 and sample size is 100 then the standard error is 0.9.
Learn more about standard error at brainly.com/question/1191244
#SPJ9
Answer:
Step-by-step explanation:
5-2x+16=6x+7
-2x-6x=7-5-16
-8x=-28
x=28/8=14/4=7/2=3.5
will be nice if you give me brainlies.Good luck!