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3 years ago

In the United States, 15,000,000 households use private wells for their water supply. Write this number in scientific notation.

Mathematics

2 answers:

Lubov Fominskaja [6]3 years ago

8 0

Answer:

1.5*10^7

Step-by-step explanation:

That's same as saying standard form

soldier1979 [14.2K]3 years ago

4 0

Answer:

1.5 x 10 to the 7th power

Step-by-step explanation:

There are 7 digits between the decimal point in 15,000,000.0 and the first digit. So it can then be rewritten as 1.5 x 10 to the 7th power

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What of these numbers is a prime number 1,11,21,51

Zepler [3.9K]

11. It is not the multiple of any numbers smaller than it

7 0

3 years ago

Which numbers are equivalent to 25%

allsm [11]

Answer:

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1/4

are the numbers equivalent to 25%

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3 years ago

A decorative window is made up of a rectangle with semicircles at either end. The ratio of AD to AB is 3:2 and AB is 30 inches.

scZoUnD [109]

Answer: The required ratio will be

$84:1034$

Step-by-step explanation:

Since we have given that

Ratio of AD to AB is 3:2

Length of AB = 30 inches

So, it becomes

$2x=30\\\\x=\frac{30}{2}=15\ inches$

So, Length of AD becomes

$3x=3\times 15=45\ inches$

Now, at either end , there is a semicircle.

Radius of semicircle along AB is given by

$\frac{30}{2}=15\ inches$

So, Area of semicircle along AB and CD is given by

$2\times \frac{\pi r^2}{2}\\\\=\frac{22}{7}\times 15\times 15\\\\=\frac{4950}{7}\ in^2$

Radius of semicircle along AD is given by

$\frac{45}{2}=22.5\ inches$

Area of semicircle along AD and BC is given by

$2\times \frac{1}{2}\pi r^2\\\\=\frac{22}{7}\times \frac{45}{2}\times \frac{45}{2}\\\\=\frac{445500}{28}\ in^2$

And the combined area of the semicircles is given by

$\frac{4950}{7}+\frac{445500}{28}\\\\=\frac{465300}{28}\ in^2$

Area of rectangle is given by

$Length\times width\\\\=AD\times AB\\\\=45\times 30\\\\=1350\ in^2$

Hence, Ratio of the area of the rectangle to the combined area of the semicircles is given by

$1350:\frac{465300}{28}\\\\=1350\times 28:465300\\\\=37800:465300\\\\=84:1034$

Hence, the required ratio will be

$84:1034$

8 0

3 years ago

Which statements about the line that passes through (−2, 0) and (2, −4) are true? Select all that apply.

inn [45]

Your question is incomplete.

Answer choices not apply.

But if this is your question in the picture below then this is your answer..

Answer:

The line intersects the y-axis at (0, −2).

The equation of the line is y = −x − 2.

The line intersects the x-axis at (−2, 0).

Step-by-step explanation:

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2 years ago

I need help factoring polynomial 3h9^-192h^6. I don't know where to begin.

Elden [556K]

First, pull out the GCM from the two terms: 3x^6(x^3-64)
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7 0

3 years ago