In a recent study to establish the effectiveness of a new cancer drug, subjects were divided into three groups. Group A got a known and effective cancer drug, group B got the new experimental compound, and group C got a combination of the two drugs. In this study the nurses administering the drugs did not know which group or what drug was being administered to their patients. Which of the following is a correct statement about this study?

A. It was a blind study because subjects did not know the treatment they were receiving.

B. It was a double-blind study because neither the subject nor the experimenter knew what the treatment for a patient was.

C. It was not a blind study because there was no placebo.

D. It was not a blind study because patients knew they were participating in a study.

a box 3 3/4 feet long or 4+ feet.

step-by-step explanation:

overpriced

step-by-step explanation:

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4

i have not got your picture clearly so see it once again