exam Maths Puzzle Numerical Ability

What is the directrix of the parabola with the equation y+3= 1/10 (x+2)^2?

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exam Other Question

Hi, Can anyone help with this word problem? The height h in feet of an object after t seconds is given by the function h = -16t2 + 20t + 5. How long will it take the object to hit the ground? Round your answer to the nearest thousandth. Can someone help me on this problem?

I need to graph the solution set of the following inequalities:

x > 4
<______________>

Thanks,
Lyn