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Masteriza [31]
3 years ago
12

11 NEED HELP ASAP WILL GIVE BRAINLY

Mathematics
1 answer:
fomenos3 years ago
3 0

Answer:

the second answer seems to be the most reassonable

Step-by-step explanation:

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The figure à shown on ancient coin which was once used in china.the coin is in the shape of a circle of radius 3cm with a square
lianna [129]

Answer:

(1) 2π - x² = 0 (2) x = 2.5 cm (3) perimeter = 10 cm

Step-by-step explanation:

(1)The area of the circular coin without the inner square removed is πr² where r = 3 cm is the radius of the coin. So, the area of the coin without the inner square removed is πr² = π(3 cm)² = 9π cm²

The area of the square of x sides removed from its center is x².

The area A of the each face of the coin is thus A = 9π - x²

Since the area of each face of the coin A = 7π cm²,

then

7π = 9π - x²

9π - 7π - x² = 0

2π - x² = 0

(2) Solve the equation 2π - x² = 0

2π - x² = 0

x² = 2π

x = ±√(2π)

x = ± 2.51 cm

Since x cannot be negative, we take the positive answer.

So, x = 2.51 cm

≅ 2.5 cm

(3) Find the perimeter of the square

The perimeter of the square, p is given by p = 4x

p = 4 × 2.51 cm

= 10.04 cm

≅ 10 cm

8 0
3 years ago
There is small pond which is 8 metres long, 4metre wide and 2metre deep what is the volume
d1i1m1o1n [39]
Volume=Length * Width * Height 
Volume= 8 * 4 * 2 
Volume=64m 
4 0
3 years ago
$250 at 6.5% for 3 years
Finger [1]

Answer:

hmhmhmhh hkm ntyiod dfov

Step-by-step explanation:

8 0
3 years ago
What is is a mean in math
ivann1987 [24]

Answer:

S

C

H

O

O

L

Step-by-step explanation:

Seven

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Hours

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3 0
3 years ago
Read 2 more answers
Evergreen Wildlife Preserve has 110 animals, and 66 of them are birds of prey. What percent of the animals are birds of prey?
Korolek [52]

Answer:

60%

Step-by-step explanation:

let ,x% is birds of prey

total animals=110

birds of prey=66

then,

x%of 110=66

x/100×110=66

110x/100=66

1.1x=66

x=66/1.1

x=60%

I'm not sure if this is correct.

7 0
3 years ago
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