2 and 3/4 is a mixed number and the decimal of it is 2.75
$125.4 is the answer to #1
#2 im not sure how the 10% effects the problem. so i cant help you there
Answer:
384 cm²
Step-by-step explanation:
Since it is a square pyramid, the total surface area of the pyramid is the area of its square base plus the area of its 4 triangular faces.

Area of a triangular face
= ½ ×12 ×10
= 60 cm²

Base area of pyramid
= 12 ×12
= 144 cm²
∴ Surface area of pyramid
= 4(60) +144
= 240 +144
= 384 cm²
The answer to your question is option A
Step-by-step explanation:
It's 27/35, so 27/1 * 1/35