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Nady [450]
2 years ago
12

Can I get help on this question?

Mathematics
2 answers:
sweet-ann [11.9K]2 years ago
8 0
Not here

Radius is half the diameter 40/2=20

Circumference = 2*pi*radius
2*3.14*20 = 125.6
125.6*5 = 628
erastova [34]2 years ago
4 0

Answer:

the answer should be 200

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Given a focus of (4, 5) and directrix of y= -3 , find the equation of the parabola.
andrey2020 [161]
Check the picture below.

notice, the focus point is at 4,5 whilst the directrix line is at y = -3, below the focus point, meaning the parabola is vertical and opening upwards.

keeping in mind that the vertex is "p" distance from either of these fellows, then the vertex is half-way between both of them, notice in the picture, the distance from y = 5 to y = -3 is 8 units, half that is 4 units, thus the vertex 4 units from the focus or 4 units from the directrix, that puts it at (4,1), whilst "p" is 4, since the parabola is opening upwards, is a positive 4 then.

\bf \textit{parabola vertex form with focus point distance}\\\\
\begin{array}{llll}
(y-{{ k}})^2=4{{ p}}(x-{{ h}})
\\\\
\boxed{(x-{{ h}})^2=4{{ p}}(y-{{ k}})}
\end{array}
\qquad 
\begin{array}{llll}
vertex\ ({{ h}},{{ k}})\\\\
{{ p}}=\textit{distance from vertex to }\\
\qquad \textit{ focus or directrix}
\end{array}\\\\
-------------------------------

\bf \begin{cases}
h=4\\
k=1\\
p=4
\end{cases}\implies (x-4)^2=4(4)(y-1)\implies (x-4)^2=16(y-1)
\\\\\\
\cfrac{1}{16}(x-4)^2=y-1\implies \cfrac{1}{16}(x-4)^2+1=y

8 0
3 years ago
Anyone know this please and thank you
Semmy [17]
The graph shown is not a function because points (-1,2) and (-1,0) have the same x value.
4 0
3 years ago
Help me i need help plz
Maru [420]
The answer is B and C
6 0
3 years ago
Read 2 more answers
Help please I’ll give extra poubts
Fed [463]

Answer:

the answer is B

Step-by-step explanation:

subtract 33 from 90

6 0
3 years ago
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I need help answering these two questions
oksian1 [2.3K]

Answer:

A and B

Step-by-step explanation:

Hopefully this helps

8 0
2 years ago
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