exam Maths Puzzle Numerical Ability

Could someone please help me with this word problem???

in 1995, the life expectancy of males in a certain country was 62.8years. in 2001, it was 66.3years. Let represent the lif

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exam Other Question
solve by using the Quadratic formula xsqrt+4x-1=0 i try for hours not right can you help me solve this problem

find the difference quotient
f(x+h)- f(x) for 2-x^2
____________
h