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AnnyKZ [126]
3 years ago
6

A ball is thrown vertically upward from ground level with an initial velocity of 80 feet per second. The ball's h height after t

seconds is given by the equation h = −16t2 + 80t. How long will it take for the ball to hit the ground?
Mathematics
2 answers:
Mariulka [41]3 years ago
4 0

Answer:

A

Step-by-step explanation:

It only takes 5 seconds friend.

Dafna1 [17]3 years ago
4 0

Answer:

<u>The ball will take 5 seconds to hit the ground.</u>

Step-by-step explanation:

The ball's h height after t seconds is given by the equation h = −16t² + 80t

When the ball hit the ground, the height will be zero.

∴ h = −16t² + 80t = 0

∴ −16t² + 80t = 0    take t as common

t ( -16t + 80) = 0

∴ t = 0  Or   -16t + 80 = 0

-16t + 80 = 0

-16t = -80

t = -80/-16 = 5 seconds

<u>So, The ball will take 5 seconds to hit the ground.</u>

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WINSTONCH [101]

Answer:

Probability of Alice win the game is \frac{6}{11}

Step-by-step explanation:

When a die is rolled then probability of getting 6 is =\frac{1}{6}

So probability of winning the game P(W)=\frac{1}{6}

Now probability of losing the game P(L)=1-\frac{1}{6}=\frac{5}{6}

It is given that Alice starts the game

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So probability that Alice win the game =P(W)+P(L)P(L)P(W)+P(L)P(L)P(L)P(L)P(W)+.....

So P(w)=\frac{1}{6}+\frac{5}{6}\times \frac{5}{6}\times \frac{1}{6}+\frac{5}{6}\times \frac{5}{6}\times\frac{5}{6} \times \frac{5}{6}\times \frac{1}{6}......

Now taking \frac{1}{6} common and applying sum of infinite GP P(W)=\frac{1}{6}\times \frac{1}{1-\frac{25}{36}}=\frac{1}{6}\times \frac{36}{11}=\frac{6}{11}

Probability of Alice win the game is \frac{6}{11}

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3 years ago
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5 0
3 years ago
2 1 point
mafiozo [28]

Answer:

  • The graph has a minimum.
  • The graph has a y-intercept at (0, -3).
  • The solutions ... are -1 and 3.
  • The vertex is located at (1, -4).
  • In the equation, 'a' would be positive.

Step-by-step explanation:

When the graph has a low point, it has a minimum. 'a' is positive in that case. The coordinates of that low point are (1, -4). That point is the vertex.

The graph crosses the y-axis at y = -3, so the y-intercept is (0, -3).

The graph crosses the x-axis at (-1, 0) and (3, 0). These points represent the solution to the equation y = 0.

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  • The graph has a y-intercept at (0, -3).
  • The solutions ... are -1 and 3.
  • The vertex is located at (1, -4).
  • In the equation, 'a' would be positive.
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I would say both B and F would be polynomials.
6 0
4 years ago
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