### Home > CALC > Chapter 6 > Lesson 6.1.4 > Problem 6-48

6-48.

On the moon, the acceleration due to gravity is about −5 ft/sec

^{2}. An astronaut jumps into the air with an initial upward velocity of 12 ft/sec. Homework Help ✎How long is the astronaut off the ground?

How far off the ground does the astronaut rise?

What do the zeros of *s*(*t*) represent?

Find the *y*-value of the vertex of *s*(*t*). You can use Algebra or Calculus.