exam Maths Puzzle Numerical Ability

Find the focus, directrix, and vertex of- y+1=-1/4(x-3)^2

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how would i find the equation for perpendicular lines (2 of them are intersecting), when one has the points (-1,1),(5,3), and the other (3,-2),(1,4)??? 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