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2 years ago

A very large book has pages numbered from 1 to 11521. How many times is the digit 3 printed? Helppp

Mathematics

1 answer:

-Dominant- [34]2 years ago

7 0

Answer:

The total number of pages from page X to page Y is Y minus X plus 1.

So from 1 to 9, there are 9 minus 1 is 8 plus 1 is 9.

Step-by-step explanation:

You might be interested in

Ursula bought 9 dozen rolls of first aid tape for the health office. The rolls were divide equally into 4 boxes.

Vilka [71]

A dozen is equal to 12 so you have to do 12 x 9 = 108.

108 ÷ 4 = 27 so there was 27 rolls in each box.

6 0

2 years ago

Nx-5= -0.4 What is N?

denis-greek [22]

Answer:

$\large\boxed{n=\dfrac{4.6}{x}}$

Step-by-step explanation:

$nx-5=-0.4\qquad\text{add 5 to both sides}\\\\nx-5+5=-0.4+5\\\\nx=4.6\qquad\text{divide both sides by}\ x\neq0\\\\\dfrac{nx}{x}=\dfrac{4.6}{x}\\\\n=\dfrac{4.6}{x}$

6 0

3 years ago

Read 2 more answers

Question 10

KonstantinChe [14]

Answer:

area of the trapezoid=1/2(7+12)×5

=47.5cm

7 0

2 years ago

Question:

aivan3 [116]

Answer:

part A) The scale factor of the sides (small to large) is 1/2

part B) Te ratio of the areas (small to large) is 1/4

part C) see the explanation

Step-by-step explanation:

Part A) Determine the scale factor of the sides (small to large).

we know that

The dilation is a non rigid transformation that produce similar figures

If two figures are similar, then the ratio of its corresponding sides is proportional

Let

z ----> the scale factor

$\frac{CB}{C'B'}=\frac{CD}{C'D'}=\frac{BD}{B'D'}$

The scale factor is equal to

$z=\frac{CB}{C'B'}$

substitute

$z=\frac{4}{8}$

simplify

$z=\frac{1}{2}$

Part B) What is the ratio of the areas (small to large)?

Area of the small triangle

$A=\frac{1}{2}(2)(4)=4\ units^2$

Area of the large triangle

$A=\frac{1}{2}(4)(8)=16\ units^2$

ratio of the areas (small to large)

$ratio=\frac{4}{16}=\frac{1}{4}$

Part C) Write a generalization about the ratio of the sides and the ratio of the areas of similar figures

In similar figures the ratio of its corresponding sides is proportional and this ratio is called the scale factor

In similar figures the ratio of its areas is equal to the scale factor squared

4 0

3 years ago

One estimate of the population of the world on January 1, 2005, is

inn [45]

Answer:

8,566,379,470 people

Step-by-step explanation:

Let's start simple. In order to find the population increase on January 1, 2006, we need to multiply 6,486,915,022 by 1.4% and add it to 6,486,915,022.

6,486,915,022*1.4% = 90,816,810.308
90,816,810.308+6,486,915,022 = 6,577,731,832.31 people on January 2006.

Note that the above two steps gives the same answer as 6,486,915,022*1.014.

So we need to do this for each year. 20 years pass between 1/1/2005 and 1/1/2025.

We need to do 6,486,915,022*1.014*1.014*1.014... 20 times.

This is equivalent to $6,486,915,022*1.014^{20}$ .

Multiplying it out gives us 8566379470.2 = 8,566,379,470 people.

4 0

3 years ago