exam Maths Puzzle Numerical Ability

Solve the equation in the interval 0<_ x < 2(3.14). The equation is: sec^2 -2=0

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exam Other Question

Can someone help me on this problem:

I need to place the following set of numbers in ascending order:

-2, 8, 0, 2, -3, -20, 11

Thank you,
Lyn AFTER 6MONTHS OF USE, THE VALUE OF TANIA'S COMPUTER HAD DROPPED TO $900.00. AFTER 8 MOS. THE VALUE HAD GONE DOWN TO $750. HOW MUCH DID THE COMPUTER COST ORIGINALLY?