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iren2701 [21]
3 years ago
11

639.497 rounded to the nearest tenth

Mathematics
1 answer:
Sphinxa [80]3 years ago
7 0
It is 639.5. this is how you round numbers to the nearest tenth: 

if the digit in the hundredths place is 5 or more you round up one, if it is lower than 5 it stays the same, pay no attention to the thousandths place....ex--> 0.497 
the 4 is the tenths place 
th 9 is the hundredths place 
the 7 is the thousandths place......since 9 is 5 or more you round the 4 up one number, so the 4 would be a 5. pay no attention to the 7. lets do another 

0.426 
the 4 stays as a 4 because 2 is a lower number than 5.
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maks197457 [2]

The square piece of wood measures 32 in per side,

Then the circle that can be cut off it has a radius of 16 in (half of the diameter 32 in)

Therefore, the area of the circle is going to be given by the formula:

\begin{gathered} \text{Area}=\pi R^2 \\ \text{Area}=\pi(16)^2\text{ }\approx803.\, 84in^2 \end{gathered}

And the area of the initial square was:

Area = 32^2 in^2 = 1024 in^2

Therefore the left-overs of the piece of wood would be the difference:

1024 in^2 - 803.84 in^2

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balu736 [363]

Answer:

5

Step-by-step explanation:

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Step-by-step explanation:

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Find the number of real number solutions for the equation. x^2+0x-1=0
larisa86 [58]
<span>x^2 + 0x - 1 = 0

x^2 - 1 = 0

This is a difference of two squares which factors into the product of a sum and a difference with the pattern: a^2 - b^2 = (a + b)(a - b).

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Simplify the following equation completely. Write your answer in only positive exponents.
kotegsom [21]

Answer:

Appears to be A with a typo.

Should be \frac{3a^{12}*b^{3}}{4}

Step-by-step explanation:

To evaluate or simplify expressions with exponents, we use exponent rules.  

1. An exponent is only a short cut for multiplication. It simplifies how we write the expression.

2. When we multiply terms with the same bases, we add exponents.

3. When we divide terms with the same bases, we subtract exponents.

4. When we have a base to the exponent of 0, it is 1.

5. A negative exponent creates a fraction.

6. When we raise an exponent to an exponent, we multiply exponents.

7. When we have exponents with parenthesis, we apply it to everything in the parenthesis.

We will use these rules to simplify.

\frac{12a^8b^{-7}}{(4a^{-2}b^{-5})^2}\\\\\frac{12a^8b^{-7}}{4^2a^{-4}b^{-10}} \\\\\frac{12}{16}*\frac{a^8}{a^{-4}}*\frac{b^{-7}}{b^{-10}}\\\\\frac{3}{4}*a^{8--4}*b^{-7--10}\\\\    \frac{3}{4}*a^{12}*b^{3}

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