First picture

1. The area of ??the trademark paper is at least: 2X3.14X(3/2)X(11.5-3-1.5)

=65.94 square centimeters.

2. 6mm=0.6cm,

This toothpaste can be used: 56.52 divided by [3.14X(6/2)^2X2]

=100 sky.

3. The weight of this pile of rice is: 3.14X[18.84 divided by (2X3.14)]^2X1.5X600

=25434 kilograms.

Second picture

2. (1) Volume = (1/3)X[3.14X(6/2)^2X4.5]

=42.39 cubic decimeters.

(2) Volume = 3.14X[(10/2)^2-(6/2)^2]X20

=1004.8 cubic centimeters.

The third picture

4. (1) The plastic films on the greenhouse are: 3.14X2X15

=94.2 square meters.

(2) The space in the greenhouse is approximately: (1/2)X3.14X2^2X15

=94.2 cubic meters.

The fourth picture