Answer:

Step-by-step explanation:
we know that
The density is equal to the mass divided by the volume
Let
x-----> the mass of marble
y----> the volume of marble
z----> the density of marble

in this problem we have


substitute and solve for x


Answer: A. i think that is right
Step-by-step explanation:
I divided by 3 then multiplied by 2.
13 and 26 = 39. So the numbers are 13 & 26.
Answer:
It has 2 layers and 20 unit cubes on each layer
Step-by-step explanation: