model rocket is launched from a raised platform at a speed of 76 feet per second. Its height in feet is given by h(t)=-16t^2+76t+24 (t=seconds after launch) What is the maximum height reached by the rocket? and what time does it meet maximum height? And how long is the rocket in the air?​

Hello!

This is a question relating a quadratic equation to the vertex and roots.

Since this parabola has a negative a value, the vertex will be the maximum height that this rocket reaches.

We can find the vertex (h,k) with the following equations.

We can interpret the values like this:

At seconds after the rocket was launched, the rocket reached its maximum height of feet.

Since the y-intercept is at and this is a negative parabola, there will only be one positive root, which will be how long our rocket is in the air.

Use the quadratic formula.

Since we are searching for our positive root, this rocket is in the air for 5.407 seconds.

Hope this helps!

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,