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olga nikolaevna [1]

3 years ago

6

Hello i am just test out if the answers are real people or not respond bac if you are a real person.

1 answer:

Alex777 [14]3 years ago

7 0

Answer:

hello, I think I classify as a real person

Step-by-step explanation:

I'm 99% sure

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A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by th

olchik [2.2K]

Answer:

14.52 seconds.

Step-by-step explanation:

We have been given that the height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation $y=-16x^2+224x+121$ . We are asked to find the time, when the rocket will hit the ground.

We know that the rocket will hit the ground, when height will be 0. So to find the time when rocket will hit the ground, we will substitute $y=0$ in our given equation as:

$0=-16x^2+224x+121$

Let us solve for x using quadratic formula.

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$x=\frac{-224\pm\sqrt{224^2-4(-16)(121)}}{2(-16)}$

$x=\frac{-224\pm\sqrt{50176+7744}}{-32}$

$x=\frac{-224\pm\sqrt{57920}}{-32}$

$x=\frac{-224\pm240.66574}{-32}$

$x=\frac{-224+240.66574}{-32}, x=\frac{-224-240.66574}{-32}$

$x=\frac{16.66574}{-32}, x=\frac{-464.66574}{-32}$

$x=-0.520804375, x=14.520804375$

Upon rounding to nearest 100th of second, we will get:

$x\approx -0.52, x\approx 14.52$

Since time cannot be negative, therefore, the rocket will hit the ground after 14.52 seconds.

6 0

4 years ago

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How many cents is equal $¼

Hitman42 [59]

Answer:

25 Cents

Step-by-step explanation:

1 / 4 = 0.25 = 25 cents

3 0

3 years ago

What is the root of the equation x/3+1/3=1/2-x/2?

dimulka [17.4K]

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Answer:

x = 1/5

Step-by-step explanation:

You can eliminate fractions by multiplying the equation by 6.

2x +2 = 3 -3x

5x = 1 . . . . . . add 3x-2

x = 1/5 . . . . . the root of the equation

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3 years ago

Please help !!!!!!!!

Ganezh [65]

Answer:

B

Step-by-step explanation:

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3 years ago

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Reggie,Alvin, and Jose are member of a relay running team. Reggie finished his leg of the race 2.45 seconds faster than Alvin an

user100 [1]

If R represents Reggie's time, the total time for the team is
.. R +(R +2.45) +(R -3.81) = 3R -1.36
.. = 3*57.12 -1.36
.. = 170.00 . . . seconds

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4 years ago