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balu736 [363]
3 years ago
15

Solve for x. 30 20 X-2 X

Mathematics
1 answer:
Valentin [98]3 years ago
7 0

Answer:

hm.. sorry but i don't know this..

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Step-by-step explanation:

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Sarah kicked a ball in the air. The function
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Answer: The ball hits the ground at 5 s

Step-by-step explanation:

The question seems incomplete and there is not enough data. However, we can work with the following function to understand this problem:

f=30 t- 6t^{2} (1)

Where f models the height of the ball in meters and t the time.

Now, let's find the time t when the ball Sara kicked hits the ground (this is when f=0 m):

0=30 t- 6t^{2} (2)

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This quadratic equation can be written in the form at^{2}+bt+c=0, and can be solved with the following formula:  

t=\frac{-b \pm \sqrt{b^{2}-4ac}}{2a} (5)  

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c=0  

Substituting the known values:  

t=\frac{-(-5) \pm \sqrt{(-5)^{2}-4(1)(0)}}{2(1)} (6)  

Solving we have the following result:

t=5 s  This means the ball hit the ground 5 seconds after it was kicked by Sara.

6 0
3 years ago
The building below is shown to scale; for every 1 inch of drawing, it is 5 feet in actual distance. The exterior surface area of
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What is 3025/10000 in simplest form?
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101/400 or .3025 is your answer
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2 years ago
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