Answer:
mass = density · volume
Step-by-step explanation:
To find the mass of a given volume, multiply your given volume by the <em>density</em>. Often, density is given in grams per cubic centimeter. 1 cubic centimeter is the same as 1 milliliter.
The first one.
The first one. 7x² times 2x = 14x³
the answer willllll be 6 units
D would be the best option in my opinion