2 years ago

Please help!

Mathematics

1 answer:

anygoal [31]2 years ago

3 0

Answer: 5

Step-by-step explanation:

I really just guessed by looking at the equation but it is correct because I double checked

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The height H of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 9

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Answer:

The ball will be 84 feet above the ground 1.125 seconds and 4.5 seconds after launch.

Step-by-step explanation:

Statement is incorrect. Correct form is presented below:

The height $h(t)$ of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 90 feet per second is given by equation $h(t) = 3 +90\cdot t -16\cdot t^{2}$ , where $t$ is time in seconds. After how many seconds will the ball be 84 feet above the ground.

We equalize the kinematic formula to 84 feet and solve the resulting second-order polynomial by Quadratic Formula to determine the instants associated with such height:

$3+90\cdot t -16\cdot t^{2} = 84$