exam Maths Puzzle Numerical Ability

In square MKJN,diagonal MK measures square of 50 and in rectangle IJKL,diagonal KI measures 13.What is the length of IJ or KL?

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CAN SOMEONE PLEASE HELP ME WITH THIS PROBLEM:

R(x)= x^3 - 2x^2 - 7 / x^6 - 2x^5 + 6x^2 - 4. How many vertical asymptotes are possible? Roberto invested some money at 7% and then invested $5000 more than twe the amount at 9%. His total income for two investments was $3950. How much was invested at 9%?