Friday

February 27, 2015

February 27, 2015

Posted by **Nilan** on Monday, October 10, 2011 at 7:53am.

h = -16t^2 +vot + 480

If vo = 96, find times when the projectile will be at a) height of 592 ft above the ground and b) crash on the ground.

- algebra -
**Reiny**, Monday, October 10, 2011 at 8:38amso h = -16t^2 + 96t + 480

a)

you want

-16t^2 + 96t + 480 = 592

t^2 - 6t + 7 = 0

(t-7)(t+1) =0

t = 7 or a negative

b)

same thing except now you want

-16t^2 + 96t + 480 = 0

solve for t, use only the positive result

**Answer this Question**

**Related Questions**

College Algebra - A projectile is thrown upward with an initial velocity of 272 ...

Algebra - If a ball is thrown vertically upward from a height of 56ft. above ...

Calculus - If a ball is thrown straight up into the air with an initial velocity...

Algebra 2 - If an object is thrown vertically upward with an initial velocity of...

Algebra - If an object is thrown vertically upward with an initial velocity of ...

Math - A ball is thrown downward from the top of a 100-foot building with an ...

Algebra 1 - A ball is thrown into the air with the in initial upward velocity of...

algebra - Rock is thrown from the top of a building. The formula h=-16t+234 ...

Calculus - If a ball is thrown straight up into the air with an initial velocity...

algebra - a ball is thrown downward from the too of 110 ft bldg with an initial ...