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Natali [406]
3 years ago
12

A running track has a diameter 100 m. find the area of the running track in square meters.

Mathematics
2 answers:
Alex3 years ago
8 0

Answer:

the area is about 314.2 square meters

Step-by-step explanation

a= πr²

A=π10²

a≈ 314.2

Vesnalui [34]3 years ago
3 0

Answer: 7850 square meters.

Step-by-step explanation: A= pi times radius squared. to find the radius of the circle, divide the diameter by 2.

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Read 2 more answers
The produce market is having a sale on grapes and oranges. A customer found the following two receipts in her cart as she was wa
AleksandrR [38]

Answer:

Step-by-step explanation:

From the first receipt:

2 pounds of grapes + 4 pounds of oranges = 10.70 which, in an algebraic equation, looks like this:

2g + 4o = 10.70

From the second receipt:

3 pounds of grapes + 2 pounds of oranges = 9.65 which, in an algebraic equation, looks like this:

3g + 2o = 9.65

Putting those together into a system and solving using the elimination method:

2g + 4o = 10.7

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I am going to eliminate the oranges first since it's easier to do that. I will multiply the second equation by -2 to get a new system:

2g + 4o = 10.7

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As you can see, the oranges are eliminated because 4o - 4o = 0o. That leaves us with only the grapes:

-4g = -8.6 so

g = 2.15

Grapes cost $2.15 per pound. Now sub that into either one of the original equations to solve for the cost per pound of oranges:

2(2.15) + 4o = 10.7 and

4.3 + 4o = 10.7 and

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5 0
3 years ago
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Bond [772]

Answer:

i think it is 8/125

Step-by-step explanation:

slect B

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Which must be true select three options
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