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Alex
1 year ago
6

Hello I need help on this math question​

Mathematics
1 answer:
Zigmanuir [339]1 year ago
8 0

Answer:

50.24\ cm ^2

Step-by-step explanation:

Let's start by finding the radius of this circle.

D=2r\\8=2r\\\text{Divide both sides by 2}\\r=4

Note that in the equation:

A=\pi r^2

"A" stands for area and "r" stands for radius.

Now, let's substitute the given values into the equation.

A=\pi r^2\\A=3.14*(4)^2\\A=3.14*16\\A=50.24\ cm^2

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A vcr and tv were bought for 8000 each. The shopkeeper made a loss of 4 per cent on vcr and 8 per cent prophit on the tv. Find t
aleksley [76]

Answer:

  2% gain

Step-by-step explanation:

We assume the shopkeeper bought the appliances at the indicated prices, and that gain is computed on the basis of that cost price.

Since the base cost is the same for each appliance, the percentages can be added directly to find the percentage gain on 8000. However, the shopkeeper's total outlay was 16000, not 8000, so the final gain percentage is half of that total.

  gain percent = (-4% + 8%)/2 = 2%

_____

If you want to see the actual numbers:

  Loss on VCR = 4% × 8000 = 320.

  Gain on TV = 8% × 8000 = 640.

Total gain on 16000 is -320 +640 = 320. As a percentage, that is ...

  320/16000 × 100% = 2%

7 0
3 years ago
HURRY I'LL PICK A BRAINLIEST PERSON!!!
Furkat [3]
7a-2b=5a+b
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7 0
3 years ago
Read 2 more answers
3 over 5 is 30% of what number?
denis23 [38]
3/5 = 0.3 * x
3/5 is 30% of x - This is how they match up from the word problem to a number sentence

So to solve it...
3/5 = 0.3x
x = 3/5 ÷ 0.3 = 2
8 0
3 years ago
These figures are similar. The area of one is given. Find the area of the other. PLZ HELP
stellarik [79]

Answer:

12 in squared

Step-by-step explanation:

Since the side on the bigger figure is 6 and the smaller figure‘s side is 3, that means the smaller figure is half the size of the big figure.

So.. 24 divided by 2 is 12

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2 years ago
i am a solid figure with two congruent polygons that are bases,connected with lateral face that are rectangles.
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Rectangular prisim is the answer
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