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skad [1K]
3 years ago
13

When the number formed by reversing the digits of a two digit number is added to the original number, the sum is 99. If the same

number is subtracted from the original number, the difference is 27. Find the original number.​
Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
7 0

Answer:

The sum of the digits of a two digit number is subtracted from the original number. The new number must be divisible by what numbers?

Step-by-step explanation:

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What if you magnified the image of a cluster fly by 9 times 10 to the third power?
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It would either be 9*(10^3) which would be <em>9000</em>.

Or, it would be (9*10)^3, which equals <em>729000</em>.

Please try and get another answer to make sure!

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Let f(x) = sin(x) + icos(x). Show that |f(x)| = 1.
Oksanka [162]
F(x) = sin(x) + icos(x)
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3 years ago
Which expression has the fewest significant figures?
yanalaym [24]

Hello!

Here are some rules to determine the number of significant figures.

  1. Numbers that are not zero are significant (45 - all are sigfigs)
  2. Zeros between non-zero digits are significant (3006 → all are sigfigs)
  3. Trailing zeros are not significant (0.067 → the first two zeros are not sigfigs)
  4. Trailing zeros after a decimal point are always significant (1.000 → all are sigfigs)
  5. Trailing zeros in a whole number are not significant (7800 → the last two zeros are not sigfigs)
  6. In scientific notation, the exponential digits are not significant, known as place holders (6.02 x 10² → 10² is not a sigfig)

Now, let's find the number of significant figures in each given number.

A). 296.54

Since these digits are all <em>non-zero</em>, there are 5 significant figures.

B). 5003.1

Since the two <em>zeros are between non-zero digits</em>, they are significant figures. Thus, there are 5 significant figures.

C). 360.01

Again, the two zeros are between non-zero digits. There are 5 significant figures.

D). 18.3

All of these digits are non-zero, hence, there are 3 significant figures.

Therefore, expression D has the fewest number of significant figures being 3.  

4 0
3 years ago
Read 2 more answers
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