Use the table to answer the question.

x Substituted Evaluate True Statement?
12
24
36
48
When set off, a certain firework follows the path of the quadratic function h=−25/36x^2+162/3x
, where:

h=
the height of the firework in feet.
x=
the horizontal distance it travels in feet.
To determine how far the firework will travel before reaching the ground, determine which value of x in table is a solution to the equation 0=−25/36x^2+162/3x
.

(1 point)
Responses

48 feet
48 feet

24 feet
24 feet

36 feet
36 feet

12 feet

1 answer

To solve for the values of \( x \) that result in the firework reaching the ground (where \( h = 0 \)), we need to set the equation given in the problem to zero:

\[ 0 = -\frac{25}{36}x^2 + \frac{162}{3}x \]

The next steps involve simplifying the equation:

  1. Simplify \( \frac{162}{3} \): \[ \frac{162}{3} = 54 \]

  2. Rewriting the equation: \[ 0 = -\frac{25}{36}x^2 + 54x \]

  3. Multiply the whole equation by -36 to eliminate the fraction: \[ 0 = 25x^2 - 1944x \]

  4. Factoring out \( x \): \[ 0 = x(25x - 1944) \]

From this equation, there are two possible solutions: \[ x = 0 \quad \text{or} \quad 25x - 1944 = 0 \]

To find the second solution: \[ 25x = 1944 \] \[ x = \frac{1944}{25} \] \[ x = 77.76 \]

Next, we need to check the values in the provided table (12, 24, 36, 48 feet) to find where the height reaches zero. Clearly, we found \( x \approx 77.76 \), which is not in the options.

However, we can calculate where the quadratic will touch the x-axis:

By solving \( -\frac{25}{36}x^2 + 54x = 0 \), we see that using the provided options:

  1. For \( x = 12 \): \[ h = -\frac{25}{36}(12^2) + 54(12) = -\frac{25}{36}(144) + 648 = -100 + 648 = 548 \]

  2. For \( x = 24 \): \[ h = -\frac{25}{36}(24^2) + 54(24) = -\frac{25}{36}(576) + 1296 = -400 + 1296 = 896 \]

  3. For \( x = 36 \): \[ h = -\frac{25}{36}(36^2) + 54(36) = -\frac{25}{36}(1296) + 1944 = -900 + 1944 = 1044 \]

  4. For \( x = 48 \): \[ h = -\frac{25}{36}(48^2) + 54(48) = -\frac{25}{36}(2304) + 2592 = -1600 + 2592 = 992 \]

Since none of the checked values gives zero, it appears none of these are on the x-axis, suggesting that perhaps there is no real solution.

If we determine values for which \( h < 0 \):

  • h becomes negative after approximately \( x = 77.76 \), meaning it remains positive at given x-values, which means maybe none of these stated ( x- values are solutions.

In conclusion, there is no value of \( x \) in the table (12, 24, 36, 48 feet) that gives a height of zero as per the quadratic equation. The correct value of none of those options provided satisfy the equation of \( h = 0 \) as computed above.

If asked to select one of those based on insights (the closest operational solution), 48 feet is a typical candidate for maximum height but is not a true solution to h=0.

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