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Andrew [12]
3 years ago
14

Pages in a book are numbered from 1 to 1001. How many of these page numbers include the digit 7?

Mathematics
2 answers:
Pie3 years ago
6 0

Answer:

100

Step-by-step explanation:

one digit number=7 (1 page)

two digit numbers=17,27,37,47,67,77,87,97(9)

three digit numbers=

107,117,127,137,147,157,167,177,187,197 (10)

207,217,.................................,277,287,297 (10)

307,317,..................................,377,387,397 (10)

404,..........................................477,487,497 (10)

507,...................................................................(10)

607,....................................................................(10)

707,717,727,737,747,757,767,777,787,797 (10)

807,..............................................................,897 (10)

907,..............................................................,997 (10)

total number of pages=1+9+9(10)=10+90=100

Brilliant_brown [7]3 years ago
6 0

Answer:

Hello :)

Step-by-step explanation:

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3 years ago
Will give barinliest. I need help Now.
Aloiza [94]

Answer:

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Step-by-step explanation:

4 0
3 years ago
A circular swimming pool has a radius of 28ft. There is a path all the way around the pool that's 4ft wide. A fence is going to
Natalka [10]

Answer:

Therefore 200.96 ft.of fencing are needed to go around the pool path.

Step-by-step explanation:

Given, a circular swimming pool has a radius of 28ft. There is a path all the way around the pool. The width of the path 4 ft.

The radius of the outside edge the pool path is

= Radius of the pool + The width of the path

= (28+4) ft

= 32 ft.

To find the length of fencing, we need to find the circumference of outside the pool path.

Here r= 32 ft

The circumference of outside edge of the pool path

=2\pi r

=(2\times 3.14 \times 32) ft

=200.96 ft.

Therefore 200.96 ft.of fencing are needed to go around the pool path.

3 0
4 years ago
Find the area please.​
lorasvet [3.4K]

Answer:

  40 square feet

Step-by-step explanation:

The area of a parallelogram is given by the formula ...

  A = bh . . . . . base b, height h

Your figure shows a base length of 10 feet and a height of 4 feet.

The area is ...

  A = (10 ft)(4 ft) = 40 ft²

5 0
2 years ago
I WILL GIVE BRAINLIEST
Ber [7]

Answer:

The answer is 450

Step-by-step explanation:

I got this equation:

x- the speed in which the turtle walks

5x+5(x+10)=4.5x+150+x*(150)/(x+10)

I got x=40, x=-50/11, but you can't have negative speed, so the turtle's speed is 40 meters per hour. After that, I just plugged in x onto one of the expressions and got 450.

4 0
3 years ago
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