Assume that the heights of female executives are normally distributed. A random sample of 20 female executives have a mean height of 62.5 inches and a standard deviation of 1.1 inches. Construct a 98% confidence interval for the population variance, σ2.

answer: b.

step-by-step explanation:

it is b. cause the equations are put in the right category

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

inverse property is the answer

step-by-step explanation: