Answer:
Step-by-step explanation:
1. 34
2.12
3. 45
<h3>Answer:</h3>
1165.83 kg
<h3>Explanation:</h3>
The total mass is the product of volume of one brick, the number of bricks, and the density. For this problem, it is convenient to use dimensions in meters.

see the attached picture:
There are six marbles total.