Answer:
Option D
Step-by-step explanation:
Generally the equation for Margin of Error is mathematically given by

Condition for Largest M.E
n has to be smallest and Z value has to be largest.
Where
From options
Smallest 
Largest Z value respects to 
Therefore
n= 300, confidence level 95%
Option D
Answer:
8/3
Step-by-step explanation:
Convert the mixed numbers to improper fractions, then find the LCD and combine.
Exact Form:
8
/3
Decimal Form:
2.
6
Mixed Number Form:
2 2
/3
Answer:
y=-7
Step-by-step explanation:
horizontal line means that it doen't cross the x axis, so you just ignore the x value
To do this you just have to do 18 × 5
which equals 90
hope this helps