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The height of Jeffrey’s egg above the ground can be found using the function y=-2x+80, where x is the time in seconds that the egg has been in the air.

Respuesta :

We need the time in seconds when the egg reaches ground

So

[tex]\\ \tt\bull\rightarrowtail y=0[/tex]

[tex]\\ \tt\bull\rightarrowtail -2x+80=0[/tex]

[tex]\\ \tt\bull\rightarrowtail -2x=-80[/tex]

[tex]\\ \tt\bull\rightarrowtail x=40s[/tex]

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