Friday

March 27, 2015

March 27, 2015

Posted by **Haiti** on Sunday, March 31, 2013 at 8:23pm.

second. Will the ball reach a height of 30 feet? If so, how long will it take?

- algebra -
**Reiny**, Sunday, March 31, 2013 at 9:13pmyou should know that

height = -16t^2 + 36t + 4

so 30 = -16t^2 + 36t + 4

16t^2 - 36t + 26 = 0

8t^2 - 18t + 13 = 0

use the quadratic equation to solve for t

( you should get an imaginary root, so the ball never reaches a height of 30 feet)

**Answer this Question**

**Related Questions**

algebra - Patty is only 7 years old, but she insists she can play basketball ...

algebra - Patty is only 7 years old, but she insists she can play basketball ...

Math - You throw a ball into the air with an initial vertical velocity of 31 ...

Algebra - The height of a ball thrown directly up with a velocity of 40 feet per...

Algebra - THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the...

Algebra - THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the...

ap calculus - The height s of a ball, in feet, thrown with an initial velocity ...

math - Let’s suppose you throw a ball straight up with an initial speed of 50 ...

algebra - Library Assignment When a ball is thrown up into the air, it makes the...

Algebra - word problem - A red ball and a green ball are simultaneously tossed ...