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Yakvenalex [24]
3 years ago
11

The sides of a square field are 12 meters.A sprinkler in the center of the field sprays a circular are with a diameter that corr

esponds to a side of the field.How much of the field is NOT reached by the sprinkler?
Mathematics
1 answer:
Olin [163]3 years ago
7 0

Answer:

Step-by-step explanation:

The formula for determining the area of a square is expressed as

Area = L²

Where

L represents length of each side of the square.

The side of the square is field us 12 meters long. Therefore

Area of the square field = 12² = 144ft²

The formula for determining the area of a circle is expressed as

Area = πr²

Where

r represents radius if the circle.

π is a constant whose value is 3.14

Diameter of the circular area covered by the sprinkler is 12 meters.

Radius = 12/2 = 6 meters.

Area of the field covered by the sprinkler would be

Area = 3.14 × 6² = 113.04ft²

Therefore, the area of the field that is NOT reached by the sprinkler would be

144 - 113.04 = 30.96ft²

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Answer:

  D

Step-by-step explanation:

In the second quadrant, ...

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In the third quadrant, ...

  d = 360° -arccos(-3/4) ≈ 221.41°

Then cos(c+d) = cos(327.67°) ≈ 0.84498

This is a positive irrational number, greater than 21/100, so the only reasonable choice is the last one:

  \dfrac{21+24\sqrt{7}}{100}\approx 0.84498

_____

Perhaps you want to work this out using the trig identities.

  cos(c) = -√(1 -sin(c)²) = -7/25

  sin(d) = -√(1 -cos(d)²) = -(√7)/4

Then the desired cosine is ...

  cos(c+d) = cos(c)cos(d) -sin(c)sin(d)

  cos(c+d) = (-7/25)(-3/4) -(24/25)(-√7/4)

  cos(c+d) = (21 +24√7)/100 . . . . matches choice D

8 0
2 years ago
What is the slope of the line that contains
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Answer:

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Step-by-step explanation:

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m = (49 - 45)/(5 - 10)

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4 0
3 years ago
Find the coordinates of the midpoint of the segment given at its endpoints A(5,8) and B(-1, -4)
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(x_{m},y_{m} )  = (\frac{X_{A} +X_{B} }{2}  ,\frac{Y_{A} + Y_{B} }{2})

(x_{m},y_{m} )  = (\frac{5-1}{2}  ,\frac{8-4 }{2})

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7 0
3 years ago
Simplify<br> 12 cm : 60 mm
a_sh-v [17]

Answer:

cm^3/5

Step-by-step explanation:

STEP 1:             m

Simplify   ——

           60

Equation at the end of step 1:           m

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STEP 2 :Multiplying exponential expressions : 2.1    m2 multiplied by m1 = m(2 + 1) = m3.

final result is cm^3/5

7 0
2 years ago
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