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max2010maxim [7]
4 years ago
6

How many3 digit numerical passwords are there if a digit can be repeated

Mathematics
1 answer:
ipn [44]4 years ago
6 0

The first digit can be any one of 10 (0 - 9).  For each of those . . .
The second digit can be any one of 10 (0 - 9).  For each of those . . .
The third digit can be any one of 10 (0 - 9).

So the total number of possibilities is  (10 x 10 x 10) = 1,000 .

Another way to look at it:

If each digit in the password can be any digit, then the total number
of them is exactly how many counts you have when you count from
zero to the highest 3-digit number. 

Counting from  000  to  999, you have 1,000 counts.

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Express 194720 in standard form correct to 3 significant figures<br>​
ELEN [110]

Answer:

1.95 x 10^5

Step-by-step explanation:

First look at the 4th digit in the number 194720 as the the question said to round to 3 significant figures. If the 4th digit is more than 5, then add 1 to the third digit which results in 195000. Now the question also said to express in standard form. Look for the first non-digit number in 195000. After 1 put a decimal point and remove all the zeros after the point which results in 1.95. Now count how many digits you moved to the left which comes as 5. Write the answer as 1.95 x 10^5.

Hope you can understand this!!

3 0
2 years ago
What is the least common denominator of 1/3 and 4/7?
jolli1 [7]

Answer:

21

Step-by-step explanation:

The denominators are 3 and 7 and those are both odd numbers.

You can not get a number lower than 21. Therefore 21 is the LCM (Lowest common denominator.)  

Hope this helps :)

5 0
3 years ago
Define least common multiple​
AlexFokin [52]

Answer:

the smallest common multiple of two or more numbers

Step-by-step explanation:

6 0
4 years ago
If p and q vary inversely and p is 17 when q is 4, determine q when p is equal to 2.
Maslowich

Answer:    what the hec... what kind of question-

Step-by-step explanation:

6 0
3 years ago
PLS HELP!! THIS IS A VERY HARD QUESTION!! I NEED IT TO BE DONE!!!! ILL GIVE BRAINLIEST!!!! PLEASE!!!!
krek1111 [17]

Answer:

990.36$

Step-by-step explanation:

You times 18 by 42 then you get 756 then you times that by 1.31$

7 0
3 years ago
Read 2 more answers
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