-6/7= -0.857
-8-0.875
=-8.875
Answer:
0.142
Step-by-step explanation:
From the question, we identify the following parameters;
n = 49
p = 82% = 82/100 = 0.82
alpha, α = 1-0.99 = 0.01
Zα/2 = Z_0.005 = 2.575
margin of error = Zα/2 * √( p(1-p)/n)
Margin of error = 2.575 * √(0.82)(1-0.82)/49
Margin of error =0.1416005 which is approximately 0.142
Answer:
23
Step-by-step explanation:
f(x)=x^4+2x^2-1
Let x = -2
f(-2) = (-2)^4 +2(-2)^2 -1
=16 +2*4-1
=16+8-1
24-1
23
