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laiz [17]
3 years ago
14

A circular mirror has a diameter of 12 inches. A circular frame that is 3 inches wide surrounds the mirror. What is the combined

area, in square inches, of the circular mirror and the frame
Mathematics
1 answer:
soldi70 [24.7K]3 years ago
8 0

Answer:

176.71 in^{2}

Step-by-step explanation:

The equation to use to find the radius of a circle is r = \frac{d}{2}

The equation to use to find the area of a circle is A = \pi r^{2}

First, add 3 inches to the diameter of 12 inches. You will get 15 inches.

Second, you will want to find the radius. Substitute 15 for d. Solve to get the radius.

r = \frac{15}{2}

r = 7.5

The radius is 7.5 inches.

Next, you substitute 7.5 for r in the area equation. Solve to get the area.

A = \pi (7.5)^{2}

A = 176.71 in^{2}

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A commercial jet and a private airplane fly from Denver to Phoenix. It takes the commercial jet 1.6 hours for the flight, and it
lara31 [8.8K]

Answer:

  • commercial: 540 mph
  • private: 360 mph

Step-by-step explanation:

Time is inversely proportional to speed for the same distance covered. The ratio of commercial to private speeds is ...

  2.4 : 1.6 = 3 : 2

If p is the speed of the private plane, then 3/2p is the speed of the commercial plane and the difference of speeds is ...

  3/2p -p = 180

  1/2p = 180 . . . collect terms

  p = 360 . . . . . . speed of the private plane

  3/2p = 540 . . . . speed of the commercial plane

The commercial jet flies 540 mph; the private plane flies 360 mph.

6 0
3 years ago
For each fraction below find an equivalent fraction with a denominator 200. <br><br>fraction 14/25​
Shtirlitz [24]

Answer:

112/200

Step-by-step explanation:

To find an equivalent fraction with a new denominator you can simply multiply by 1. However, you must multiply by different forms of 1. Remember that any number divided by itself is equal to 1. Additionally, because of the identity property of multiplication, any number multiplied by 1 is still equivalent.

In this case, you should multiply by a fraction that will make 25=200. To get 200 from 25 you must multiply by 8. So, multiply the whole fraction by 8/8. This gives you (14/25)*(8/8)=112/200.

6 0
3 years ago
12feet<br> 12 feet<br> HELP ME PLS SNJSNAKSKW
Flauer [41]

Answer:

20 feet.

Step-by-step explanation:

Pythagoreans theorem states that a^2 + b^2 = c^2

a = 12, squared = 144

b = 16, squared = 256

144 + 256 = 400

√400 = 20

20 feet is the answer.

Hope this helps.

8 0
2 years ago
A school attendance clerk wants to determine if there is a relationship between the number of times a student arrives to school
amid [387]
The correct answer is B because the data points are too scattered

Hope this helped :)
5 0
3 years ago
What is 4/5 of 20.5?
earnstyle [38]
To find 4/5 of 20.5 the first step is to convert 4/5 into a decimal. You can do that by dividing 4 by 5. 
4/5 is .8 so your equation would now be .8 of 20.5 
"of" states that you are multiplying, so .8 times 20.5 is 16.4
4/5 of 20.5 is 16.4

6 0
3 years ago
Read 2 more answers
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