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VMariaS [17]
3 years ago
9

What is the main idea of the article, "Great Wall of China"?

Chemistry
1 answer:
grin007 [14]3 years ago
7 0

well, without the article, I'm guessing the main idea is about the Great Wall of China

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Explain how you can convert from the number of representative particles of a substance to moles of that substance.
Scrat [10]

Answer:

  • the number of representative contain in 1 mol of a substance equals to 6.o2x10^23 particles.
8 0
3 years ago
The cost of painting the circular traffic sign shown below is $3.50 per square foot. How much, to the nearest dollar, will it co
KiRa [710]

The cost of painting the traffic sign of 7.065 square feet is approximately equal to 25 dollar.

<u>Explanation:</u>

The cost of painting the circular traffic sign is given as 3.50 dollar per square feet. The diameter of the traffic sign is 36 inch, then its radius will be \frac{36}{2} = 18 inches.

But as the cost is given in unit of feet, we have to convert the radius from inches to feet.

1 inches = 0.0833 feet

18 inches = 18 × 0.0833 feet

So, the radius of the traffic sign will be approximately equal to 1.5 feet.

The area of the traffic sign will be \pi r^{2} = 3.14 \times 1.5 \times 1.5 = 7.065 square feet.

So, if the cost of painting 1 square feet of traffic sign is 3.50 dollar, then

cost of painting 7.065 square feet of traffic sign =  3.50 × 7.065 = 24.7 dollar.

Thus, the cost of painting the traffic sign of 7.065 square feet is approximately equal to 25 dollar.

8 0
3 years ago
What is the gulf stream.<br> a surface current<br> a deep current <br> a river <br> a climate event
guapka [62]
I think it’s a climate event
5 0
3 years ago
How did the grsnd cayon form
Alchen [17]

Answer:

erosion

Explanation:

4 0
3 years ago
Carbon monoxide prevents __________. A. the breakdown of other chemicals in the liver B. fuel from igniting at the wrong time C.
aksik [14]

Answer: C. the blood from carrying oxygen to the tissues of the body.

The carbon monoxide is a poisonous gas, it inhibits the ability of the hemoglobin to distribute oxygen. Hemoglobin is a protein in the red blood cells. The function of the hemoglobin is to distribute oxygen throughout the body. It has high affinity for oxygen. The carbon monoxide replaces oxygen in the hemoglobin. This results in respiratory and cardiac arrest.

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3 years ago
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