exam Maths Puzzle Numerical Ability

You are to estimate the measure of the angle created by the hour and minute hands on the clocks and classify the angle as being acute, straight, right or obtuse:

8:10 Estimate:

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exam Other Question

Can someone please help me answer this question?
The vertex of the graph of the quadratic function f(x)= -2^2+7x-3 is
My answer options are:
A. ((4/70,f(4/7))
B. ((-4/7),f(-4/7 Please help factor, this one, I find very difficult. thanks!

(t^2+2)^2+4(t^2+2)-32