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m_a_m_a [10]
3 years ago
15

Can someone please answer. There is only one question. There's a picture too. Thank you!

Mathematics
1 answer:
Akimi4 [234]3 years ago
4 0
I supposed π ≈ 3.14 and we have A = 490.87 km²:

Area(A) is:  A = π × r²  or   3.14 × r² = 490.87 →

 r² = 490.87/3.14 → r² = 156,32 → r = √156,32 → r = 12.5

But diameter (d) is:  d = 2 × r → d = 2 × 12.5 →d = 50 km


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144 ft^2

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property of 45-45-90 triangle: side lengths are 12rt2

12rt2*12rt2/2=144

5 0
3 years ago
Joan wants to set a 4-digit unlock code for her mobile phone. She plans to use only odd numbers and to make sure that no number
LuckyWell [14K]

Answer: 120

Step-by-step explanation:

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6 0
1 year ago
Hey guys iv got one 3 tons to pounds thanks so much.
Art [367]

Answer:

3 tons = 6000 pounds

Step-by-step explanation:

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5 0
2 years ago
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Which answer do I pick .
Jobisdone [24]
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5 0
3 years ago
Here is the question in the image
Artist 52 [7]

The coordinates of the edges of the <em>mini-solar</em> cooker are (x₁, y₁) = (0, - 60) and (x₂, y₂) = (0, 60).

The distance between the two edges is 120 centimeters.

The equation for the <em>parabolic</em> mirror is x + 32 = (2/225) · y².

<h3>How to analyze a parabolical mini-solar cooker </h3>

Herein we must understand the geometry of the design of the <em>mini-solar</em> cooker to determine all needed information. The y-coordinates of the edges of the cooker are determined by Pythagorean theorem:

y = \pm \sqrt{(68\,cm)^{2}-(32\,cm)^{2}}

y = ± 60

The coordinates of the edges of the <em>mini-solar</em> cooker are (x₁, y₁) = (0, - 60) and (x₂, y₂) = (0, 60). The distance between the two edges is 120 centimeters.

Lastly, the equation of the <em>parabolic</em> mirror can be determined based on the equation of the parabola in <em>vertex</em> form:

x - h = C · (y - k)²     (1)

Where:

h, k - Coordinates of the vertex

C - Vertex constant

If we know that (h, k) = (- 32, 0) and (x, y) = (0, 60), then the vertex constant of the equation of the parabola is:

0 + 32 = C · 60²

C = 2/225

Then, the equation for the <em>parabolic</em> mirror is x + 32 = (2/225) · y².

To learn more on parabolae: brainly.com/question/21685473

#SPJ1

6 0
2 years ago
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