exam Maths Puzzle Numerical Ability

i have to find the volume of a rectanglar solid with a lenth 8, width 4, and height 2.

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exam Other Question

If you are standing 85 ft. from the base of a flag ploe, and determined that at ground level, you would need to look up at a 30 degree angle to see the top of the flag pole, how tall is the flag pole round the hight to tenths. solve the following system of equtions and give the general solution in parametric vector form.

x+y-2z=6
3y+z-w=3
-2x+y+2z-w=9