Which shows the correct substitution of the values a, b, and c from the equation 0 = 4x2 + 2x - 1 into the quadratic formula
below?
Quadratic formula: x = -b3
x=-2/22 - 4(4) – 1)
2(4)
x = -2 /2 -4(4)(1)
2(4)
x=-2 V22 + 4(4) - 1)
2(4)
x = -2+v-22-4(4) – 1)
2(4)

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?