Math

The height h in metres above the ground of a projectile at any time t in seconds after the launch is defined by the function h(t)=-4t +48t +3

A.) Complete the square to write H in standard form
b.) Find the height of the projectile three seconds after the launch
c.) Find the maximum height reached by the projectile
D.) how many seconds after the launch is the maximum height reached

e.) what was the height of the projectile at the launch

f.) determine when the projectile hits the ground to the nearest tenth of a second

I only got a.) but not sure if its right
-4(t-6)^2+147

Question #2: Ashley was asked by her math teacher to find two numbers which differ by 8 and whose product is a minimum .

a.) if X represents the smaller number write a quadratic expression in x for the product of the two numbers

b.) write the product and completed square form

c.) determine the numbers and the minimum product

Thanks :)

asked by Sarah
  1. 55 is the product of Chau's height and
    5

    posted by Anonymous

Respond to this Question

First Name

Your Response

Similar Questions

  1. Pre-Calc, please a.s.a.p!!

    A projectile propelled straight upward from the ground is modeled by the function d(t)=-16t^2+304t. a) At what time does the projectile reach maximum height? b) What is the maximum height? c) At what times is the projectile more
  2. math

    The height, h(t), of a projectile, in metres, can be modelled by the equation h(t) = 14t – 5t2, where t is the time in seconds after the projectile is released. Can the projectile ever reach a height of 9m? Explain.
  3. Math

    Height of a Projectile. The height of a projectile is described by the equation: s(t)=144t-16t^(2) Where t is in seconds and s(t) is the height of the projectile at time t. Find when the projectile hits the ground.
  4. Algebra II

    A projectile is launched from a platform 10 meters above ground with an initial upward velocity of 20 meters per second. Find the time when the projectile has returned to the initial height launch, find the time the projectile
  5. Physics(science)

    A ball's projected at an angle X to the horizontal from a cliff 96 metres high and strikes the ground at a distance of 260 metres away from the cliff.The time of its flight is 7 seconds.If it's assumed that air resistance's
  6. Physics

    Projectile motion problem where a projectile is launched from level ground and lands on level ground. I have to use the kinematic equations to show that the time it takes for the projectile to reach its maximum height is equal to
  7. Polynomials

    A rock is thrown upward at a speed of 10 metres per second. The height of the rock above the ground is given by the formula h=10t-2.0t². Where h is the height in metres above the ground and t is the time in seconds. Then what is
  8. physics

    a projectile is fired from the top of a building with an initial velocity straight upward at 40m/sec. the top of the building is 50 meters above the ground? a) the maximun height of the projectile above the building b) the time
  9. PHYSICS

    A Projectile IS FIRED FROM THE TOP OF A BUILDING WITH AN INITIAL VELOCITY STRAIGH UPWARD AT 40.0 M/SEC . THE TOP OF THE BUILDING IS 50.0 METERS ABOVE THE GROUND. A) THE MAXIMUN HEIGHT OF THE PROJECTILE ABOVE THE BUILDING. B) THE
  10. Physics

    A projectile of mass 0.377 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.1 m/s. The projectile rises to a maximum height of y above the end of

More Similar Questions