exam Maths Puzzle Numerical Ability

1. Diameter of a circle is 1.3 x 10 (-12times) meters, then what is its radius?

2. Find the present value that will amount to $50,000 in 20 years at 8% compounded annually. (the

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exam Other Question

Find the focus, directrix, and vertex of- y+1=-1/4(x-3)^2 I hope the way this is typed out makes sense. Any help would be greatly appreciated.

(x-1)/(x^2+ 1) ∙ (x^(4 )- 1)/((x-1)�) ∙ (x^2- 1)/(x^4- 2x^2+ 1)

I came up w