20% of the students in the sixth-grade class chose pizza for lunch. This means that 6 students chose pizza. How many students are in the sixth-grade class?

A
12 students

B
26 students

C
30 students

D
48 students

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 saw this question before, dont know the asnwer srry

step-by-step explanation:

if the angular bisector of an triangle bisects the opposite side, prove that the other two sides are equal.