exam Maths Puzzle Numerical Ability

Pi and the square root of two are rational numbers, since they can be expressed as the ratio of two intergers. is this true or false?

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1b This is the order of operation problem 12-2[15-3(3(4TH POWER)-2(4TH POWER)*3)} please show me how this is solve. thanks!!! What would the volume be of a hot tub that is circular , 12 feet in diameter, 4 feet deep? This needs to be in cubic feet.