How do you find the sine function

Answer is either b or c

For a 0.25 pfor b o.3pp (0.25+0.3)=0.28

What is the rest of the question?

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 !