The answer should be the first one I think hope I helped!
The geometric mean of x and y:
The geometric mean of 4 and 25:
Answer C. 10
If it is the decimals that are giving you trouble, you can multiply both sides by 10, giving you 16k=32
To find k you divide both sides by 16
(16k)/16=(32)/16
The 16's cancel out, and the 32/16 becomes 2.
Final answer:
K=2
Maybe reflection i could be wrong though