He mean incubation time of fertilized eggs is 19 days. suppose the incubation times are approximately normally distributed with a standard deviation of 1 day. (a) determine the 20th percentile for incubation times. (b) determine the incubation times that make up the middle 39%.

1 is c

2 is a

3 is a

step-by-step explanation:

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.