Answer:
x=2 and -2
Step-by-step explanation:
f(x)=2x^2-8
set the function equal to zero to solve for x
2x^2-8=0
add 8 to both sides and divide by 2
x^2=4
take the square root of both sides to get x isolated
√(x^2)=√4
x= ±2
0.05 is the answer next time try and put it in proper format
The answer for this question is= 46.5
What is 155 percent of 30 is 46.5.
It's all from the knowledge.
Answer:
a) 0.172
b) 0.167
c) 0.1404
Step-by-step explanation:
Margin of error, E =
here,
p = probability of the event
n = sample size
a) n = 30
p = 10 ÷ 30 = 0.333
Therefore,
E =
= 2 × 0.0861
= 0.172
b) n = 30
p = 21 ÷ 30 = 0.7
Therefore,
E =
= 2 × 0.0836
= 0.167
c) n = 30
p = 22 ÷ 50 = 0.44
Therefore,
E =
= 2 × 0.0702
= 0.1404