To compute the necessary sample size for an interval estimate of a population mean, all of the following procedures are recommended when ï is unknown except :

a. use the sample standard deviation from a preliminary sample.

b. use the estimated ï from a previous study.

c. use .5 as an estimate.

d. use judgment or a best guess.

x = -2

y = 848

step-by-step explanation:

plug in the numbers

y + 11 = (1/4)(x + 16)

step-by-step explanation:

it is 570

step-by-step explanation:

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb