1.33333333333 is the answer
General form for circle is
(x - a)^2 + (y - b)^2 = r^2
so if center is at (3,-2) we can plug in a and b:-
(x-3)^2 + (y+2)^2 = r^2
Now plug in x = 7 and y =1 (from the point R)
4^2 + 3^2 = r^2
r^2 = 25 making r = 5
so its diameter = 2*5 = 10
Formula for finding area of rhombus: 
d₁ = 16 yd
Area = 72 yd²
Rhombus Area =>

16*d₂ = 144
d₂ = 9
<u>AC = 9 yd</u>
<em>Hope it helps!</em>
Answer:
-0.5
Step-by-step explanation: