exam Maths Puzzle Numerical Ability

Walt made an extra 9000 last year from a part time job. He invested part of the money at 9% and the rest at 8%. He made a total of $770.00 in interest. How much was invested at 8%?

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exam Other Question

Hi,

I need to find the surface area of a square with a base of 2yd and a height of 2yd.

Thank you Is this rational or irrational:

sqrt -

I believe this is irrational because there is no numbers involved in this, am I correct? Thank you very much!