Answer:
idk maybe 671
Step-by-step explanation:
Answer:
confidence interval
Step-by-step explanation:
confidence interval is defined that range of interval that defined degree of certainty and uncertainty for a given sampling method.
it is a probability of given sample which state that particulars parameters are lie between two set of limits.
examples - 95 % confidence interval states that there are 95% probability that given sample contain true value.
Since the normal distribution is symmetrical, we only need to consider the distribution for 56% or 0.56, because 6% is half of 12%.
The Z score is 0.15 approximately.
Z score of -0.15 is 1-0.56=0.44 and the difference between 0.56 and 0.44=0.12 which is 12%.
Therefore 12% of the distribution lies between -0.15 and 0.15.

factorising the first denominator
x²-2x-3 = x² -3x+x-3 = (x+1)(x-3)
(a) 
finding LCD
(b) LCD of (x-3)(x+1) and (x-3) is (x-3)(x+1)
(c)

(d)


