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2 years ago

A book has 100 pages, How many times is the digit ''3'' used numbering its pages?

Mathematics

2 answers:

Harrizon [31]2 years ago

5 0

19 pages. 3,13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93

ohaa [14]2 years ago

3 0

18 pages
Because if each 10 pages consists 1 page with number 3 (3, 13, 23 and etc.)
We have 10 pages with no. 3.
Also there is 30 - 39 numbers
Excluding 33 there is 8 of that kind of pages
10 + 8 = 18

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A normal distribution has \mu = 65 and \sigma = 10. Find the probability that the average score of a group of n = 4 people is be

Kipish [7]

Answer:

The probability that the average score of a group of n = 4 people is between 70 and 75=0.13591

Step-by-step explanation:

We are given that

$\mu=65$

$\sigma=10$

n=4

We have to find the probability that the average score of a group of n = 4 people is between 70 and 75.

$P(70$

$=P(\frac{5}{5}$

$=P(1$

$=P(Z$

$=0.97725-0.84134$

$=0.13591$

Hence, the probability that the average score of a group of n = 4 people is between 70 and 75=0.13591

4 0

3 years ago

171

sdas [7]

Answer:

Step-by-step explanation:

6 0

3 years ago

PLEASE HELP!

777dan777 [17]

1. 1/10 (3000) = 3000/10 = 300...so 1/10 of 3000 is 300
300/10 = 30...and 300 is 10 times as much as 30

2. 10 times as much as 8 = (10 x 8) = 80
1/10x = 80
x = 80 * 10 = 800
so 1/10 of 800 is 10 times as much as 8

3. 1/10(50,000) = 50,000/10 = 5000
5000/10 = 500
1/10 of 50,000 is 10 times as much as 500

4. 1/10(40,000) = 40,000/10 = 4,000
4000/10 = 400
1/10 of 40,000 is 10 times as much as 400

5. 1/10 (900) = 900/10 = 90
10x = 90
x = 90/10
x = 9
10 times as much as 9 is 1/10 of 900

6. 1/10 (60,000) = 60,000/10 = 6000
10x = 6000
x = 6000/10
x = 600
10 times as much as 600 is 1/10 of 60,000

7. 70 x 10 = 700
1/10x = 700
x = 700 * 10
x = 7000
10 times as much as 700 is 1/10 of 7000

8. 10 x 2000 = 20,000
1/10x = 20,000
x = 20,000 * 10
x = 200,000
10 times as much as 2000 is 1/10 of 200,000

9. 10 times as much as 2000.....2000 x 10 = 20,000
1/10 of what is 20,000.....1/10x = 20,000....multiply both sides by 10, this eliminates the 1/10 on the left side....resulting in 200,000.
so basically, 10 times as much as 2000 = 20,000 and 1/10 of 200,000 = 20,000

6 0

4 years ago

Charlie's Computer company charges $0.65 per pound to ship computer supplies. Part A: Write an equation to determine the total c

Drupady [299]

A. c = 0.65p

cost of shipping 2 lbs...
c = 0.65(2)
c = 1.30 <==

B. c = 0.60p

5 0

4 years ago

Identify a pattern in this list of numbers. Then use this pattern to find the next number. (More than one pattern might exist,

kicyunya [14]

Answer:

a) 45

The sequence 3 , 5, 9 , 15 , 23 , 33 , 45

Step-by-step explanation:

Given The sequence 3 , 5, 9 , 15 , 23 , 33

First term = 3

Add 2 of first term

Second term = 3 +2 = 5

Add 4 of second term

Third term = 5 + 4 = 9

Add 6 of Third term

Fourth term = 9 + 6 = 15

Add 8 of fourth term

fifth term = 15 + 8 = 23

Add 10 of fifth term

sixth term = 23 + 10 = 33

Add 12 of sixth term

seventh term = 33 +12 = 45

Final answer:-

Now the sequence 3, 5, 9, 15, 23, 33, __45___

3 0

3 years ago