What’s (7(123456.789)4)0 but the 4 and 0 at the end are exponents

Mathematics

1 answer:

IrinaK [193]3 years ago

8 0

Answer:

$7123456.789^{40}$ = 1.281244e+274

Step-by-step explanation:

I have NO IDEA if that helps,... BUT I hope it does,... Chow,...!

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Find the area. Please help im begging! ( Multiple choice )

Stels [109]

Answer:

B) 700.6
A) 440

Step-by-step explanation:

<u>Use formula:</u>

A = 1/2 Pa, where P-perimeter of the polygon, a- apothem

A = 1/2(7*13.9)(14.4) = 700.56 ≈ 700.6

Correct choice is B

A = 1/2(5*16)(11) = 440

Correct choice is A

5 0

3 years ago

Find the standard form of the equation of the parabola with a focus at (0, 8) and a directrix at y = -8

Gekata [30.6K]

First, let $(x,y)$ be a point in our parabola. Since we know that the focus of our parabola is the point (0,8), we are going to use the distance formula to find the distance between the two points:
$\sqrt{(x-0)^{2}+(y-8)^{2}}$

Next, we are going to find the distance between the directrix and the point in our parabola. Remember that the distance between a point (x,y) of a parabola and its directrix, $y=c$ , is: $|y-c|$ . Since our directrix is y=-8, the distance to our point will be:
$|y-(-8)|$
$|y+8|$

Now, we are going to equate those two distances, and square them to get rid of the square root and the absolute value:
$\sqrt{(x-0)^{2}+(y-8)^{2}}=|y+8|$
$(\sqrt{(x-0)^{2}+(y-8)^{2}})^{2}=|y+8|^{2}$
$(x-0)^{2}+(y-8)^{2}=y+8$

Finally, we can expand and solve for $y$ :
$x^2+y^2-16y+64=y^2+16y+64$
$x^{2}-16y=16y$
$32y=x^{2}$
$y= \frac{1}{32} x^2$

We can conclude that t<span>he standard form of the equation of the parabola with a focus at (0, 8) and a directrix at y = -8 is </span> $y= \frac{1}{32} x^{2}$