What is the value of i 20+1? a. 1 b.–1 c.–i d. i

Option D. i is the correct option.

Step-by-step explanation:

The given expression is in the form of

expression can be written as as pwers get added when multiplied.

Now we know Or then we will try to convert the expression in the form of i².

Therefore option D is the answer.

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;