A rock is thrown from the top of the Jefferson Street Bridge into the Cumberland river. The function to
your right describes the height, in feet, of the rock t
seconds after it is thrown.
h(t) = -
= - 48 + 14t + 278
What is the height of the rock, in feet 2 seconds after
it is thrown?

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Step-by-step explanation:

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

1) is right

step-by-step explanation: