my math

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My math

A cockroach fell from a 150ft building. At the same time an ant was thrown whit a velocity of 30ft/sec. how long was it till it hit the ground.

Dropped

h=o

v=o

s=150

h=-16t²+s

o=-16+150

x=-b±√b²-4ac

       2a

X=-(0) ±√ (0) ²-4(-16) (150)

             2(-16)

X=±√9600

   -32

X=±97.97

   -32

X=+97.97=-3.06

    -32

X=-97.97=3.06

     -32

Thrown

h=o

v=3o

s=150

h=-16t²+vt+s

o=-16+30+150

x=-b±√b²-4ac

       2a

X=-(30) ±√ (30) ²-4(-16) (150)

             2(-16)

X=±-30√900+9600

            -32

X=-30±10500

          -32

X=-30+102.46=-2.26

          -32

X=-30-102.46=4.13

            -32