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expeople1 [14]
3 years ago
10

The area of a circle is 49πm2. What is the diameter, in meters, of the circle?

Mathematics
2 answers:
yaroslaw [1]3 years ago
7 0

Answer:

Step-by-step explanation:

hello :

The area is :A = πr²  r : ridus    the diameter is : d=2r

calculate : r      49π = πr²  so : r²= 49     r=7   so : d=14 meters

Kamila [148]3 years ago
4 0

Answer:

14 meters

Step-by-step explanation:

The area of a circle can be found with the formula: πr^2

We can set up an equation to find the radius, and use that to find diameter.

πr^2=49π

Divide both sides by π.

r^2=49

r= \sqrt{49\\}

r=7

Radius is half of diameter, which means 2r=d

d=2(7)

d=14

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PLEASE HELP
Leto [7]

Answer:

DA = 285.7 m

Step-by-step explanation:

First we need to find the side AB in the triangle ABC, and we can do this using Pythagoras' theorem:

AB^2 = BC^2 + AC^2

AB^2 = 300^2 + 400^2

AB^2 = 25000

AB = 500 m

We can find the angle ABC with the tangent relation:

tangent(ABC) = 400/300 = 4/3

ABC = 53.13°

From triangle ABC, we have:

ABC + BCA + CAB = 180°

53.13 + 90 + CAB = 180

CAB = 36.87°

From triangle DAC, we have:

DAC + ACD + CDA = 180

36.87 + 45 + CDA = 180

CDA = 98.13°

Now to find the side of DA, we can use law of sines in triangle DAC:

DA/sin(DCA) = AC/sin(CDA)

DA/sin(45) = 400/sin(98.13)

DA = 400 * 0.7071 / 0.9899 = 285.7258 m

Rounding to nearest tenth, we have DA = 285.7 m

3 0
3 years ago
What is 8/10 x 8/21
ivann1987 [24]
8/10*8/21
= 64/210
= 32/105
5 0
3 years ago
Read 2 more answers
The gestation period of humans (266 days) is what percent longer than the gestation period of pigs (115 days).
ruslelena [56]

Answer:

56.8%

Step-by-step explanation:

(115/266)* 100 = 43.2%

which means 115 is 43.2% of 266

so,

The gestation period for Humans is 56.8% (100 - 43.2) longer than of pigs

I hope this is correct!

7 0
3 years ago
What is 30 percent of 25
sweet [91]
7.5 is 30 percent of 25 because

25 divided by 10 is 2.5 times 3 is 7.5
6 0
3 years ago
Supposed you buy two shares of a stock worth $100. It goes up by 50% .how much did you make
alexira [117]

Answer:

The answer is $150

Step-by-step explanation:

hope that helps

Solutions: $100x.50=50

$100+$50= $150

6 0
3 years ago
Read 2 more answers
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