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kondor19780726 [428]
3 years ago
13

The radius of the circle is 3 millimeters. what is the circles area

Mathematics
1 answer:
Irina18 [472]3 years ago
4 0

Answer:

28.26 millimeters

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-4x – 4y = -8<br> -2x + 4y = –10
shusha [124]

Answer:

–10

Step-by-step explanation:

8 0
3 years ago
Can some one help me with the whole paper I don’t get it
valina [46]

Answer:

I think-

1. 11

2. 0.7

3. 67.89

4. 13

Step-by-step explanation:

I'm not 100% sure tho

5 0
3 years ago
What’s the answer pleaseeeeeeeee
slega [8]

y^2 +6^2 = 12^2

y^2 +36 = 144

y^2 = 108

sqrt(108) = 10.392 = 6sqrt(3)

 Answer is B 6sqrt(3)

7 0
3 years ago
A parabolic arch has a height of 25 feet and a span of 40 feet. How high is the arch 8 feet from each side of the center?
Llana [10]

Answer:

The correct option is;

21 ft

Step-by-step explanation:

The equation of the parabolic arc is as follows;

y = a(x - h)² + k

Where the height is 25 ft and the span is 40 ft, the coordinates of the vertex (h, k) is then (20, 25)

We therefore have;

y = a(x - 20)² + 25

Whereby the parabola starts from the origin (0, 0), we have;

0 = a(0 - 20)² + 25

0 = 20²a + 25 → 0 = 400·a + 25

∴a = -25/400 = -1/16

The equation of the parabola is therefore;

y = (-\frac{1}{16})(x-20)^2 + 25

To find the height 8 ft from the center, where the center is at x = 20 we have 8 ft from center = x = 20 - 8 = 12 or x = 20 + 8 = 28

Therefore, plugging the value of x = 12 or 28 in the equation for the parabola gives;

y = (-\frac{1}{16})(12-20)^2 + 25 = (-\frac{1}{16})(-8)^2 + 25 = 21 \ ft.

4 0
3 years ago
Find the value of a <br><br>3:9=4:a
Goryan [66]

Answer:

it is equals to 3 okay ^^

7 0
3 years ago
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