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2 years ago

Which of the following would not have a positive exponent when written in scientific notation HELP PLEASE!!!!

Mathematics

1 answer:

Contact [7]2 years ago

3 0

Answer:B

Because when 0.0023 is written in scientific notation the answer is 2.3×10-³ which a negative sign

Step-by-step explanation:

5,600,000

5,600,000÷10

560,000

560,000÷10

56,000

56,000÷10

5,600

5600÷10

560

560÷10

56÷10

5.6

5.6×10⁶

23÷10

2.3

2.3×10¹

560÷10

56÷10

5.6

5.6×10²

0.0023

0.0023×10

0.023

0.023×10

0.23

0.23×10

2.3

2.3×10-³

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2 years ago

Simplify this equation Thanks a lot!!!

den301095 [7]

Answer:

-1

Step-by-step explanation:

We need to simplify the given expression . The given expression is ,

$\rm\implies ( 2 \sqrt6 +5)^{2n-1} ( 2\sqrt6 - 5)^{2n-1}$

Here we can see that the power of the both exponent is same that is (2n+1) . Recall the property of exponents ,

$\bf\implies a^m \times b^m = (ab)^m$

Using this property , we have ,

$\rm\implies ( 2 \sqrt6 +5)^{2n-1} ( 2\sqrt6 - 5)^{2n-1}$

This can be written as ,

$\rm\implies\{( 2 \sqrt6 +5) ( 2\sqrt6 - 5)\}^{2n-1}$

Simplifying using ( a+b)(a-b) = a² - b² ,

$\rm\implies\{( 2 \sqrt6)^2 -5^2 \}^{2n-1}\\\\\rm\implies ( 24 - 25)^{2n-1}$

Subtracting the numbers inside the brackets ,

$\rm\implies (-1)^{2n - 1 }$

Now we know that every odd number is in the form of 2n -1 , where n is any integer. Therefore , the power is odd .

Since the base is (-1) , for even power it is 1 and for odd power it is -1 . Therefore the final answer is ,

$\rm\implies\boxed{\quad \red{ -1 }\quad }$

Hence the required answer is (-1) .

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2 years ago

What is the answer to 7/8+4.2-4/5 equals what

natta225 [31]

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3 years ago