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4 years ago

How do you write 400,000+30,000+800+20+5 in standard form

Mathematics

2 answers:

____ [38]4 years ago

6 0

400,000 + 30,000 + 800 + 20 + 5 written in standard form is

430,825

As you can see, each digit in 430,825 is equal to 430,825 written in expanded from

Hope this helps

-AaronWiseIsBae

timurjin [86]4 years ago

3 0

4 x 10^5 + 3 x 10^4 + 8 x 10^2 + 2 x 10^1 + 5 x 10^0

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If the radius of a circle is 2 yards, what is the circles area?

Anna11 [10]

Answer:

12.56 yards

Area of Triangle: $\pi r^2$

So, $\pi$ $2^2$

Finally, 3.14*4 = 12.56

Step-by-step explanation:

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3 years ago

According to the National Association of Realtors, the mean sale price for existing homes in the United States in 2011 was $214,

Free_Kalibri [48]

<h3>Answer: 49.85% (second answer choice)</h3>

===========================================

Explanation:

mu = 214300 = population mean of home values

sigma = 41000 = population standard deviation of home values

Compute the z score for the raw score x = 91300

z = (x-mu)/sigma

z = (91300-214300)/41000

z = -123000/41000

z = -3

This tells us the raw score x = 91300 is exactly 3 standard deviations below the mean.

--------------------------

Compute the z score for the raw score x = 214300

z = (x-mu)/sigma

z = (214300-214300)/41000

z = 0/41000

z = 0

This is expected as the raw score x = 214300 is exactly at the mean

--------------------------

Finding P(91300 < x < 214300) is equivalent to computing P(-3 < z < 0)

Recall that the empirical rule states roughly 99.7% of the distribution is within 3 standard deviations of the mean.

In terms of an equation, this means P(-3 < Z < 3) = 0.997 approximately.

Cut 99.7% in half to get (99.7%)/2 = 49.85%

So, P(-3 < Z < 0) = 0.4985 approximately.

4 0

4 years ago

Judy borrows $500 from her friend and promises to pay back in 2 years with the 3% of interest rate. Calculate the simple interes

IrinaK [193]

answer: $30

500 x 0.03 x 2 = 30

30 = simple interest

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3 years ago

Find 8.5 times the difference between 77 and 13.

marissa [1.9K]

77 - 13 = 64

64 x 8.5 = 544

7 0

3 years ago

Read 2 more answers

Write an equation for an ellipse centered at the origin, which has foci at (\pm5,0)(±5,0)(, plus minus, 5, comma, 0, )and vertic

Virty [35]

Answer:

The equation of ellipse is

$\frac{x^2}{41}+\frac{y^2}{16}=1$

Step-by-step explanation:

The equation of an ellipse is

$\frac{(x-h)^2}{a^2}+\frac{(y-k)^2}{b^2}=1$

where(h,k) is the center and c is distance from the center to the foci is given by $a^2-b^2=c^2$ . a is the distance from the center to the vertices and b is the distance from the center to the co-vertices.

The center of the ellipse is the mid-point of the vertices.

The mid point of the vertices $(\pm\sqrt{41},0)$ is

= $(\frac{\sqrt{41}+(-\sqr{41})}2,\frac{0+0}2)$

=(0,0)

a is the distance between the center and the vertices.

So, $a=\sqrt{(0-\sqrt{41})^2+(0-0)^2}$

$=\sqrt{41}$

c is the distance between the center and the foci.

So, $c=\sqrt{(0-5)^2+(0-0)^2$

$a^2-b^2=c^2$

$\Rightarrow (\sqrt41)^2-b^2=5^2$

$\Rightarrow b^2=(\sqrt41)^2- 5^2$

$\Rightarrow b^2=41-25$

$\Rightarrow b^2=16$

The equation of ellipse is

$\frac{(x-0)^2}{(\sqrt{41})^2}+\frac{(y-0)^2}{16}=1$

$\Rightarrow \frac{x^2}{41}+\frac{y^2}{16}=1$

7 0

4 years ago