book Maths Puzzle Numerical Ability

The swinomish planning office has 300 feet of fencing and wants to enclose a rectangular area of 3600 square feet to protect a cultural site. What should the length and width of the fenced area be.

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If you're the frugal type and never pay more for something than it's worth, would you pay $0.50 for a cup of coffee valued at i^i (that's i to the i power)? square root of 18x2 multiplied by the square root of 12x


2) Divide 3+2i/1-1i


3) Write a quadratic equation whose solutions are 3+i and 3-i