1) 2a × 2a 2) 3a × 4a
3) 2b × 6b
4) 5 × 2a × a
5) 3a × 4a × 2a
6) 5a × 3a × a × a
7) 2a × 2 × 2a
8) 3a × 3a × 3a

hope this helps, take care, stay safe, and keep smiling (if these are wrong, i am sorry, please delete this answer if wrong)

Step-by-step explanation:

1) 4a

2)12a

3)12b

4)5 x 2a

5)24a?

6)30a?

7)4a x 2

8)27a?

x ≈ 24.1

Step-by-step explanation:

This is a right triangle. So we use trigonometric functions.

tan  Θ = opposite / adjoint

tan 15 = x / 90

90 tan 15 = x

x = 24.11542

We round it to the nearest tenth.

x ≈ 24.1