**Step-by-step explanation:**

4 tubes connected vertically.

each tube is 0.28 meters long.

it does not leave me any other form of interpretation than just to stack the tubes on top of each other.

4×0.28 = 1.12 meters

**Answer:**

34.7 minutes

**Step-by-step explanation:**

56 minutes times 62% (0.62) = 34.72

**Answer:**

Perimeter = 180

Area = 1080

**Step-by-step explanation:**

Perimeter is length of all sides added together. 30+78+72 = 180

Area is the length times the height/2 for a triangle. 30*72/2 = 1080

I hope this helped <3

12 - 3 =9 and -5i+4i=1i or i so it is {9-i}