exam Maths Puzzle Numerical Ability

a rectangular box is to be used to store materials. The inside of the box is 12.0 in. long, 9.50 in. wide, and 8.75 in. deep. What is the area of sheet lead that must be used to line the inside of the box?

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exam Other Question

(3x^2+2x-5/5x+1)+(2x^2-x+6/5x+1)

I have no idea how to do this problem
Key ^=exponents /=all over or fraction What is the capacity of a container which is 4 inches tall and has a 2-inch diameter?

Answer Choices:
A) 4pi cuin.
B) 8 cu in.
C) 12.4 pi cu in.
D) 16 cu in.