Answer:
y = -1/3 +3
Step-by-step explanation:
Answer:
The cell membrane
Step-by-step explanation:
The function of the cell membrane is to regulate what forgien substances come in and out of the cell.
20 divided by 10 is 2
10 divided by 2 is 5 so it's 2/5
Answer:
1210 acres
Step-by-step explanation:
Given data
let the old farmland be x acres
new farmland = 968 acres
therefore
let us find 20% of the old farmland
=20/100x
=0.2x
Hence
968+0.2x=x
collect like terms
968=x-0.2x
968=0.8x
x= 968/0.8
x=1210 acres
Answer:
2,655 students
Step-by-step explanation:
The z-score for a 99% confidence interval is z = 2.576
The standard error for a proportion p is:
![SE = z*\sqrt{\frac{p*(1-p)}{n} }](https://tex.z-dn.net/?f=SE%20%3D%20z%2A%5Csqrt%7B%5Cfrac%7Bp%2A%281-p%29%7D%7Bn%7D%20%7D)
For a proportion of p =0.20, in order to ensure a standard error of 0.02, the sample size 'n' must be:
![0.02 = 2.576*\sqrt{\frac{0.2*(1-0.2)}{n}}\\n=2,654.31](https://tex.z-dn.net/?f=0.02%20%3D%202.576%2A%5Csqrt%7B%5Cfrac%7B0.2%2A%281-0.2%29%7D%7Bn%7D%7D%5C%5Cn%3D2%2C654.31)
Rounding up to the next whole student, the sample size needed is 2,655 students.