Edith uses 1 cube to build tower 1.

Edith uses 6 cubes to build tower 2. There are 5 cubes on the bottom layer.

(a) Write down the total number of cubes in tower 3.

19 cubes

Attached is an image of the three towers.

Step-by-step explanation;

To determine the total number of cubes in the tower 3

, we will resolve the number of cubes for each layer of tower 3;

According to the image attached;

First layer

Number of cubes = 1+3+5+3+1 = 13

Second layer

Number of cubes = 1+3+1 = 5

Third layer

Number of cubes = 1

So, the total number of cubes for the tower 3 is the sum of the cubes on the three layers.

Total number of cubes = 13+5+1  = 19 cubes

56

step-by-step explanation:

35-60 students are taking math.