C²-4 Which expression is equivalent to
C+3
13.03.2012
?
C+3
C+2
62-4 3(02-9)
O c²-4 3(0²-9)
C+3
C+2
c² – 4
31c2-9)
C+3
C+2
C+3
C+2
82-4 3[c2-9)

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;

b

step-by-step explanation:

this is because the profit is decreasing and turning into debt

93-8=85

855=17

17*4=68

there are 68 purple marbles in that bag