What is the length of the marking pen?

Here's the solution for 1.4:

1.4 To find the length of the marking pen, we read the measurements from the ruler.

Step 1: Identify the starting point of the pen on the ruler. The pen starts at the $0 \text{ cm}$ mark.

Step 2: Identify the ending point of the pen on the ruler. The pen ends at the $13 \text{ cm}$ mark.

Step 3: Calculate the length of the pen. The length is the difference between the ending and starting points. $Length = 13 cm - 0 cm = 13 cm$ The length of the marking pen is $\boxed{A. 13 cm}$.

2.1 This question asks you to study the provided net. The net consists of a rectangle and two circles, which forms a cylinder when folded. Please send the specific questions related to this net, and I'll help you solve them.

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