1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bogdanovich [222]
3 years ago
9

Isaac wrote the integers from 1 through 104, inclusive. How many digits did he write?

Mathematics
1 answer:
Lilit [14]3 years ago
6 0

We know that Isaac wrote the integers from 1 to 104, and we need to determine how many digits did he write

Let's look at single digit, double digit and triple digit numbers separately:

Single Digit Numbers' Range: 1-9

Total Single Digit Numbers = Ending Number - Beginning Number + 1

⇒ Total Single Digit Numbers = 9 - 1 + 1 = 9

Number of digits written in single digit numbers = 9 × 1 = 9 ......... (i)

Double Digit Numbers' Range: 10-99

Total Double Digit Numbers = Ending Number - Beginning Number + 1

⇒ Total Double Digit Numbers = 99 - 10 + 1 = 90

Number of digits written in double digit numbers = 90 × 2 = 180 ....... (ii)

Triple Digit Numbers' Range: 100-104

Total Triple Digit Numbers = Ending Number - Beginning Number + 1

⇒ Total Triple Digit Numbers = 104 - 100 + 1 = 5

Number of digits written in triple digit numbers = 5 × 3 = 15 .......... (iii)

Adding (i), (ii) and (iii)

Total number of digits written from 1-104 = 9 + 180 + 15

⇒ Total number of digits written from 1-104 = 204

Hence, while writing the integers from 1-104, we use 204 digits.

You might be interested in
What is 128 5/8×2?????? plz helppp​
olya-2409 [2.1K]

Answer:

257.25

Hope This Helps!       Have A Nice Day!!

8 0
2 years ago
Read 2 more answers
53w + 13 < 56w + 16 solve for w
Sergio039 [100]

Answer:

w>-1

Step-by-step explanation:

1 Move terms

53w-56w<16-13

2 Collect like terms then subtract

-3w< 3

3 Divide both sides by -3

Answer: w>-1

4 0
3 years ago
Read 2 more answers
I NEED HELP ASAP! Which equation is represented by the graph below?
WARRIOR [948]

Answer:B

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The population of a county is growing at a rate of 9% per year, compounded continuously. How many years will it take for the pop
torisob [31]

Answer:

t=15.4\ years

Step-by-step explanation:

The  exponential growth function compounded continuously is equal to

A=P(e)^{rt}  

where  

A is the final population  

P is the initial population  

r is the rate of growth in decimal  

t is Number of years

e is the mathematical constant number

we have  

A=4x\\P=x\\ r=9\%=9/100=0.09  

substitute in the function above

4x=x(e)^{0.09t}    

simplify

4=(e)^{0.09t}

Take natural log of both sides

ln(4)=ln[(e)^{0.09t}]

ln(4)=0.09t(ln(e))

ln(e)=1

ln(4)=0.09t

t=ln(4)/0.09

t=15.4\ years

8 0
3 years ago
12 = x • 3<br><br> How to solve?
liberstina [14]
The value of x is 4
so it says that 3 times __ equals 12.
so that means that u have to do 12/3 Wi-Fi i equals 4, so that is how u do it

hope this helps!!
8 0
2 years ago
Other questions:
  • Completing the square x^2 + 10x
    7·1 answer
  • I need help for my daughters homework for write the sentence as an inequality
    7·1 answer
  • For the function given​ below, find a formula for the Riemann sum obtained by dividing the interval​ [a,b] into n equal subinter
    13·1 answer
  • What is the value of x ?
    12·1 answer
  • Which ordered pair is not a solution to the equation Y= 2x
    11·1 answer
  • HELPPPP PLEASEEEeeeeeee
    14·2 answers
  • What’s the units?? Plz need help
    13·1 answer
  • Can someone please explain this to me and help me
    13·2 answers
  • HELP! write y+4 =-2/3(x-9) in standard form
    9·1 answer
  • Evaluate the equation r-4.012=5.313
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!