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Leya [2.2K]
3 years ago
6

plzzzzzzz help if u know how to do this! anyone know how to do this? I need help and I'm giving 30 points ​

Mathematics
1 answer:
Leviafan [203]3 years ago
3 0

Answer: D

Step-by-step explanation: If you turn all of them into decimals (with 2 decimal places) then you cacn order them from least to greatest. With negatives, it is the other way.

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Find the roots of h(t) = (139kt)^2 − 69t + 80
Sonbull [250]

Answer:

The positive value of k will result in exactly one real root is approximately 0.028.

Step-by-step explanation:

Let h(t) = 19321\cdot k^{2}\cdot t^{2}-69\cdot t +80, roots are those values of t so that h(t) = 0. That is:

19321\cdot k^{2}\cdot t^{2}-69\cdot t + 80=0 (1)

Roots are determined analytically by the Quadratic Formula:

t = \frac{69\pm \sqrt{4761-6182720\cdot k^{2} }}{38642}

t = \frac{69}{38642} \pm \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321}  }

The smaller root is t = \frac{69}{38642} - \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321}  }, and the larger root is t = \frac{69}{38642} + \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321}  }.

h(t) = 19321\cdot k^{2}\cdot t^{2}-69\cdot t +80 has one real root when \frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} = 0. Then, we solve the discriminant for k:

\frac{80\cdot k^{2}}{19321} = \frac{4761}{1493204164}

k \approx \pm 0.028

The positive value of k will result in exactly one real root is approximately 0.028.

7 0
2 years ago
Help me on this math please​
FromTheMoon [43]
The correct answer is D
6 0
3 years ago
What diretction does the parabola open if its equatin is y=-4(x+2)^2
Fed [463]
It is a cap-size parabola. The parabola "goes down". The graph of this function looks like in this attached picture. 

5 0
3 years ago
anton needs to buy 3.5 meters of cloth for their project in TLE. If 1 meter of cloth costs P35.00 how much will he spend for 3.5
ElenaW [278]

Answer:

122.5

Step-by-step explanation:

3 0
2 years ago
WILL GIVE BRAINLIEST Pls answer Fast!!!
BabaBlast [244]

Answer:

the answer would be d

Step-by-step explanation:

4 0
2 years ago
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