Answer:
Step-by-step explanation:
The shape of the container isn’t changing here, so the height of the water will be proportional to the volume. 75 cm^3 is ¾ of 100 cm^3, so the water will rise ¾ as high.
¾ of 8 cm is 6 cm.
Try 18 and then multiply the sum of 2 and 18 to 7
Maybe the answer is -4 ....? I just can't find any more logic to this problem.