16 + 13p – 9p
Find the property of operations to write an equivalent expression

Heya dear

df =

both have same length

Volume is length times width times height so
20 times 8 times 30 which is 4,800
surface area is ph (p is perimeter of base), h is height.
so perimeter would be length+length+width+width so 20+20+8+8 which is 56. so multiply 56 times 30 which is 1680. hope this !

We use the property of combination therefore the answer is 22c2= (22×21)÷(2×1) = 231 ways