(Solve by Quadratic) An athlete on a track team throws a shot-put. The height y of the shot-put in feet t seconds after it is thrown is modeled by y = -16t^2 + 24.6t + 6.5. How long will it take the shot-put to hit the Ground?

2nd one in the first row is correct

step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis:

inverse operation of addition