Answer:
a K=2
b A =200
c B = ±2
Explanation:
A = kB^2
When A =50 B=5
Substitute these values in
50 = k * 5^2
50 = k*25
Divide by 25
50/25 = k25/25
2 =k
A = 2B^2
When B = 10
A = 2*10^2
A = 2 *100
A = 200
When A =8
8 =2B^2
Divide by 2
8/2 = 2/2B^2
4 = B^2
Take the square root
±sqrt(4) = sqrt(B^2)
±2 = B