A stone thrown downward with an initial velocity of 44.1 m/sec will travel a distance of S meters, where s(t)=4.9t^2 +44.1t and t is in seconds. If a stone is thrown downward at 44.1m/sec from a height of 343 m, how long will it take for the stone to hit the ground ? ^ = indicates it's squared but I was not able to find the symbol on my phone to indicate this so when factoring this equation please ensure it's squared thanks

A stone thrown downward with an initial velocity of 44.1 m/sec will travel a distance of S meters, where s(t)=4.9t^2 +44.1t and t is in seconds. If a stone is thrown downward at 44.1m/sec from a height of 343 m, how long will it take for the stone to hit the ground ? ^ = indicates it's squared but I was not able to find the symbol on my phone to indicate this so when factoring this equation please ensure it's squared thanks