## anonymous one year ago Which equation would best help solve the following problem? Hideki throws a baseball ball upward with an initial velocity of 12 m/s. When he throws the ball, it is 2 m above the ground. How long will it take the ball to hit the ground? A. –16t2+ 12t + 2 = 0 B. –4.9t2 + 12t + 2 = 0 C. –4.9t2 + 12t = 2 D. 4.9t2 + 12t + 2 = 0

1. anonymous

@pinkbubbles

2. anonymous

@pinkbubbles

3. anonymous

–4.9t2+ 22t = 1.5 or –16t2+ 30t = 0 not sure what do you think?

4. anonymous

i agree

5. anonymous

umm i think the first one

6. anonymous

@pinkbubbles ?

7. anonymous

what makes you think is the 1st one?

8. anonymous

hint: $$\bf \text{initial velocity}\\ h = -16t^2+v_ot+h_o \qquad \text{in feet}\\ h = -4.9t^2+v_ot+h_o \qquad \text{in meters} \\ \quad \\ v_o=\textit{initial velocity of the object}\\ h_o=\textit{initial height of the object}\\ h=\textit{height of the object at "t" seconds}$$

9. anonymous

that would be B then right @pinkbubbles

10. anonymous

yup! c:

11. anonymous

yeah