While hiking along a the top of a cliff, Sarah through a pebble over the edge. The height,h, in meteres


Question:


While hiking along a the top of a cliff, Sarah through a pebble over the edge. The height,h, in meteres of the pebble above the ground after t seconds is modelled by h= -2.4t +18.1t + 94.
a. When does the pebble hit the ground?
b. How long does it take until the pebble is at the same height it was thrown form?




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