2 years ago

The chart below shows the distribution of the number of books in a library.

Mathematics

1 answer:

Softa [21]2 years ago

8 0

Answer:

It's C.

Step-by-step explanation:

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Answer:

y=-0.215x^2+35

Step by Step:

Let, $h=0$ , $k=35$ , $x=8$ , $y=21$

We know that, the general equation of the parabola.

$y-k = a(x-h)^2$

$\Rightarrow y=a(x-h)^2+k .........(i)$

Substitute the value of $h, k, x, y$ in equation $(i)$ and find the value of $a.$

$21=a(8-0)^2+35$

$\Rightarrow 21=a\times 8^2+35$

$\Rightarrow 21=64a+35$

$\Rightarrow 64a=21-35$

$\Rightarrow 64a=-14$

$\Rightarrow a=\frac{-14}{65}$

$\Rightarrow a=-0.215$

Hence, the equation of the parabola is:

$y=-0.215x^2+35$

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A 2-pint bottle of water costs $5.80. What is the price per cup?

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Step-by-step explanation:

1 pint = 2 cups

2 cups = $5.80

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59 is a rational number
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