3.2 is the Length of y 7.5 is the length of z and the length of x is 12.5
Step-by-step explanation:
the first one is 4 and the second one is 11.6
Y = k / x² ( y varies inversely as the square of x )
y = 1/8 when x = 1:
1/8 = k / 1²
8 k = 1
k = 1/8
For x = 5:
y = 1/8 / 5² = 1/8 : 25 = 1/8 · 1/25 = 1/200
Answer: A ) 1/200