exam Maths Puzzle Numerical Ability

Evaluate each function for the value specified:
f(x)=x(to the power of 2)-7x+10: find (a)f(0), (b)f(5), and (c)f(-2).
McGraw Hill 6th edtion, chapter 7.5 exercise # 2
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exam Other Question
FROM A SQUARE PIECE OF CARDBOARD WITH WIDTH x INCHES, A SQUARE OF WIDTH x-3 INCHES IS REMOVED FROM THE CENTER. WHAT IS THE AREA OF THE REMAINING PIECE AS A FUNCTION OF x. Find the domain and range for the following functions. Use interval notation.

f(x)= &#8730;9-x^2 if 0&#8804;x<3
f(x)= e^x if x<0