The following information will be used for the following two questions:
The analytical laboratory of a pharmaceutical company is asked to evaluate the claim that the concentration of an active ingredient in a product is 0.80%. The mean of four repeated analyses of the specimen x-bar is 0.82%. The standard deviation is known to be sigma equals 0.01 percent The true concentration of the active ingredient is the mean of the population of repeated analyses and the population has a normal distribution.
Using the information above, give a 99% confidence interval for µ.

(0.8071%, 0.8328%)

(0.7871%, 0.8129%)

(0.79%, 0.81%)

(0.7942%, 0.8458%)

(0.75%, 0.80%)

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

yes

step-by-step explanation:

yes

step-by-step explanation:

i'm pretty sure it would take 20 hours because it's half the men so you multiply the number of hours it takes by 2

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation: