Drag numbers into the blanks to show that f(x) = x - 2x + 5 has exactly 2 roots in the set of complex numbers by completing the square. x² - 2x+5=0
2-2x =
x² - 2x+
(x - 1)2 =
(x - 1) = +
Therefore, there are two roots of f(x), x =
and x =
-5
-4
-3
-2
- 1
0
1
2
3
4
5
21
1 + 2
1 -2i
-1 + 2i
-1-2i

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

i think the answer is 90 hope this