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3 years ago

the average person loses about 8×10 strands of hair how many strands of hair does the average person lose in 9 days

2 answers:

5 0

810 strands of hair is lost in 9 days
(8x10= 80, 80x9=720)
count on your fingers (ONLY WHEN MULTIPLYING BY 9) and then put the finger down that you're multiplying 9 by and then look at the fingers around it. (7 and 2 then since its 80 add a 0!)

Masteriza [31]3 years ago

3 0

It depends you mean per day or if so..... it is 720

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3 years ago

What is the equation of the quadratic graph with a focus of (6, 0) and a directrix of y = −10 ?

Mademuasel [1]

Answer:

$(x-6)^{2}=20(y+5)^{2}$

Step-by-step explanation:

The standard for for the equation of a parabola is $(x-h)^{2}=4p(y-k)$

The focus is given as $(h, k+p)$

The directrix is given by $y=k-p$

Comparing focus given as $(6,0)$ to formula of focus $(h,k+p)$ , we see that $h=6$ and $k+p=0$
Comparing directrix given as $y=-10$ to formula of directrix $y=k-p$ , we can write $k-p=-10$

We can use the two system of equations [ $k+p=0$ and $k-p=-10$ ] to solve for $k$ and $p$ .

Adding the two equations gives us:

$2k=-10\\k=\frac{-10}{2}\\k=-5$

Using this value of $k$ , we can find $p$ by plugging this value in either equation. Let's put it in Equation 1. We have:

$k-p=-10\\-5-p=-10\\-5+10=p\\p=5$

Now, that we know $h=6$ , $k=-5$ , and $p=5$ , we can plug these values in the standard form equation to figure out the parabola's equation. Doing so and rearranging gives us:

$(x-6)^{2}=4(5)(y-(-5))^{2}\\(x-6)^{2}=20(y+5)^{2}\\$

This is the equation of the parabola with focus $(6,0)$ and directrix $y=-10$

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3 years ago

Read 2 more answers

On to the next question

madam [21]

It equals 2.37365 Radian

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3 years ago