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marissa [1.9K]
3 years ago
11

The area of the circle is 1384.74 units squared. What is the surcumfrence of the circle

Mathematics
1 answer:
kirill115 [55]3 years ago
7 0

Answer:

131.88 units

Step-by-step explanation:

Area of the circle = πr^{2} = 1384.74 sq. units

       r^{2} = \frac{1384.74}{3.14} = 441 = 21^{2}

   r  = 21 units

Circumference of circle = 2πr  = 2*3.14*21 = 131.88 units

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the variable z is directly proportional to x. when x is 6, z has the value 18. what is the value of z when x = 10 the variable z
nikklg [1K]
Z\alpha x
Z=kX
When x=6, z=18,
Finding value of z,
18=k*6
k=3
Z=3X
when x=10,
Z=3*10
Z=30

Part B;
Z\alpha  \frac{1}{x}
z=\frac{a}{x}
Where x is a constant of proportionality,
when x=3, z=2
2=\frac{a}{3}
a=3*2
a=6
When x is 13,
Z=\frac{6}{13}
6 0
3 years ago
Solve: -3= 12x-5(2x-7)
leonid [27]

Answer:

x = -19

Step-by-step explanation:

-3= 12x-5(2x-7)

Distribute

-3= 12x-10x+35

Combine like terms

-3 = 2x +35

Subtract 35 from each side

-3-35 = 2x+35-35

-38 = 2x

Divide each side by 2

-38/2 = 2x/2

-19 =x

7 0
3 years ago
3 ounces of cinnamon cost $2.40. There are 16 ounces in 1 pound how much the cinnamon cost per pound
faltersainse [42]
16 ounces in a pound
2.40 for 3 ounces
16 divided by 3 = 5.333
2.40 * 5.333 =
12.8
Approx $12.80 for 1 pound of cinnamon
3 0
3 years ago
At a resting pulse rate of 75 beats per minute, the human heart typically pumps about 73 mL of blood per beat. Blood has a densi
Kaylis [27]

Answer:

There is approximately 5.475 liters of blood in the body.

Step-by-step explanation:

At a resting pulse rate of 75 beats per minute, the human heart typically pumps about 73 ml of blood per beat.

73 ml in liters = 73\times0.001=0.073 liters

Now, 75 beats/min x  0.073 liters/beat  = 5.475 liters/min

And 5.475 liters/min x 1 min/body = 5.475 liters/body

Hence, there is approximately 5.475 liters of blood in the body.

7 0
3 years ago
Does anyone know the equation to this graph
Eduardwww [97]

Answer: The equation of this graph can be written in slope intercept form which is what I am assuming you want.  If you do not want that form you can convert to any other form that you so desire.  The slope intercept equation for this graph would be y = -1x - 2.  The -1 is the slope of the line and the -2 is the y intercept.

3 0
3 years ago
Read 2 more answers
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