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satela [25.4K]
2 years ago
5

forty percent of the first 20 whole numbers are prime. how many of the first 20 whole numbers are prime​

Mathematics
1 answer:
Deffense [45]2 years ago
7 0

Answer:

there are 8 prime numbers before 20

Step-by-step explanation:

forty percent of 20 is:

40% × 20=

\frac{40}{100}×20= 8

so the number of whole prime numbers before 20 are 8.

They are:

2,3,5,7,11,13,17,19.

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A painting measure 40 cm by 35 cm how many squared cm does its surface cover
miskamm [114]

Answer: Its surface covers  1400 cm²

Explanation:

Since the length of painting = 40 cm

Breadth of painting = 35 cm

Since we know that area of rectangle is product of dimensions.

∴ Area of painting = length × breadth

= 40 cm × 35 cm

= 1400 cm²

∴ Its surface cover  1400 cm².

8 0
2 years ago
Whats 9+12 i need help please help me
Anuta_ua [19.1K]

Answer:

21

Step-by-step explanation:

bc

1

12

9

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21

4 0
3 years ago
Read 2 more answers
He value represented by the 2 in 423 is times the value represented by the 2 in 72.
melisa1 [442]
It is 1/10 times the value represented in the 2 in 423.
It is 10 times the value represented in the 2 in 72
3 0
3 years ago
The lines intersect at point C. What is the value of x?
Agata [3.3K]

<u>Answer:</u>

The correct answer option is 21.

<u>Step-by-step explanation:</u>

We know that the given lines PW and AD intersect at the point C.

Therefore, the two given angles are equal to each other and we can write them in the form of an equation as:

(4x - 4)° = (3x + 17)°

Solving for x to get:

4x - 4 = 3x + 17

4x - 3x = 4 + 17

x = 21

Therefore, the value of x is equal to 21.

5 0
3 years ago
Read 2 more answers
Devon needs a wood board with an area of 516 square yard to complete a project. If the wood board is 13 yard wide, how long must
nataly862011 [7]

Answer:

L=\frac{15}{16}\ yd

Step-by-step explanation:

<u><em>The correct question is</em></u>

Devon needs a wood board with an area of 5/16 square yard to complete a project. If the wood board is 1/3 yard wide, how long must the board be?

we know that

The area of a rectangle is equal to

A=LW

where

L is the length

W is the width

we have

A=\frac{5}{16}\ yd^2\\\\W=\frac{1}{3}\ yd

substitute

\frac{5}{16}=L(\frac{1}{3})

solve for L

L=\frac{5}{16}(3)

L=\frac{15}{16}\ yd

5 0
2 years ago
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