For this case we have by definition, that the total surface area of a regular pyramid with a square base is given by:

Where:
p: It is the perimeter of the base
S: It's the inclination
It is the area of the base
Substituting:

ANswer:
Option B
Answer:
54
Step-by-step explanation:
Use PEMDAS
1. 6 x 6 + 12 + 3 x 2 (multiply 6 and 6)
2. 36 + 12 + 3 x 2 (multiply 3 and 2)
3. 36 + 12 + 6 (combine like terms, so add them)
4. 54 (final answer)
I’m gonna say c, but I’m not for sure
Answer:
None of the above
A- The peak is at 2 years, not 4 years.
B- There is no gap at 5 to 7 years. There are still dots on 5-7.
We will evaluate both expressions step by step.
Sylvia's espression:
h + 0.05h
h: Original hat price.
0.05h: Increase of 5% due to sales tax.
Jin's expressions:
1.05h
h: Original hat price.
1.05: Factor for which you must multiply the original price to add 5% due to sales tax.