We need to use the formula to find Margin of Error but through the sample proportion, that is

We will use a 95% confidence interval, that is a z value of 1.96 (Search in a Normal distribution table)
A) For A our
(proportion) is equal to 0.45. So applying the formula,


B) We make the same of point A, but change our proportion to 0.35


c) We need to calculate the SE through proportion for 0.1, that is

Then our Error is given by,



Answer:
Step-by-step explanation:
Aromatic amine is generally less nucleophilic than aliphatic amine because of the aromatic delocalisation of the lone pair. Ketones are also less reactive compared to aldehyde and Reaction between aromatic amine and aromatic ketone is possible leading to the formation of Schiff's base in aqeous ethanoic solution.
Answer:
23x = -115
Step-by-step explanation:
In the substitution method, you must solve for 1 variable in 1 equation to replace it in the other equation. For the system:
2x - 7y = 4
3x + y = -17
Solving for y in the second equation:
y = -17 - 3x
Replacing y in the first equation:
2x - 7(-17 - 3x) = 4
2x + 119 + 21x = 4
23x = -115
This is the new equation after use the substitution method.