Answer:
n = 106
Step-by-step explanation:
Given
p = 0.5 and 1-p = q = 0.5
Margin of error = 0.08
Confidence level = 90%
Z score for 90% confidence level = 1.65
As we know -
Margin of error = z * Sqrt (pq/n)
Substituting the given value, we get –
0.08 = 1.65 * Sqrt (0.5*0.5/n)
Squaring both the sides and solving, we get
n = 1.65^2*0.5^2/0.08^2
n = 106.34 = 106
by 10 years it'll be 24439 but by 11 it'll be 25661 so it's technically 11 years
Hopefully this helps you get how to set up these types of problems
Answer:
8:15pm they started Playing
Combine the -7b and 4b with Like terms to simplify