Answer:
The mass will alter with time as water is absorbed back into the crystals.
Step-by-step explanation:
The Pythagorean theorem a²+b²=c²
16²+18²=c²
256+324 = 580
√580
24=4x-6
(add six both sides)
30=4x
(divide 4 both sides.)
7.5=x (roughly)
The answer is b I hope this help
