Height of a Projectile

[nycmathguy]

Section 2.7
Question 68

Part (a)

0 = -16t^2 + 128t

Is this the correct setup?

Part (b)

When will s be < 128?

128 < -16t^2 + 128t

Is this the correct set up?

 

[MathLover1]

yes, the set up is correct

 

[nycmathguy]

yes, the set up is correct

Ok. I'll take it from here.