Answer:
1.72
Step-by-step explanation:
So lets see what its asking: how much greater is the third rocks mass than the combined mass of the other two rocks. So greater means subtract. and combined means add so we add 19.28+25.3 which equals 44.58. Then subtract that from the thrid mass which is 46.3 So minus. 46.3−44.58
= 1.72
