Applying the rules of exponents, the letter answers that form the code are: MATH IS NOT JUST ANOTHER FOUR LETTER WORD.
<h3>What are the Rules of Exponents?</h3>
Some of the rules of exponents to be applied are as follows:

<h3>What are Equivalent Expressions?</h3>
If two expressions have the same value, both are said to be equivalent expressions.
1. 

Answer: H
2. 3³/6² = 27/36 = 3/4
Answer: R
3. ![\frac{3^2}{3^5} = 3^{2 - 5} = 3^{-3]} = \frac{1}{3^3} = \frac{1}{27}](https://tex.z-dn.net/?f=%5Cfrac%7B3%5E2%7D%7B3%5E5%7D%20%3D%203%5E%7B2%20-%205%7D%20%3D%203%5E%7B-3%5D%7D%20%3D%20%5Cfrac%7B1%7D%7B3%5E3%7D%20%3D%20%5Cfrac%7B1%7D%7B27%7D)
Answer: M
4. 7²/7² = 49/49 = 7° = 1
Answer: J
5. 8^-2 = 1/8² = 1/64
Answer: A
6. (4²)(4³) = 4^(2 + 3) = 
Answer: L
7. (3²)³ = 3²*³ = 
8. 4° × 4^-1 = 1 × 1/4 = 1/4
Answer: E
9.
= 1
Answer: U
10. 
Answer: I
11.
= 1
Answer: D
12. 
Answer: F
13.
= 8² = 64
Answer: S
14.
1/2³ × 1/3² = 1/8 × 1/9 = 1/72
Answer: O
15. 
Answer: N
16.
= 2
Answer: T
Thus, applying the rules of exponents, the letter answers that form the code are: MATH IS NOT JUST ANOTHER FOUR LETTER WORD.
Learn more about the rules of exponents on:
brainly.com/question/12140519
You multiply height x width x length to get the volume
Here it is given that the triangles ABP and DCR are similars, therefore we use the ratio rule which states that
corresponding sides of similar triangles are in same proprtion .

that gives
7/10 = BP/11
7*11=10BP
BP=7.7
Again using the ratio rule

7/10 = AP/6
42 = 10AP
AP = 4.2
Perimeter= AB+BP+AP = 7+7.7+4.2 = 18.9
Correct option is A.
X is greater than or equal to 21