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3 years ago

10

The diameter of the circle shown below is

1 answer:

Artyom0805 [142]3 years ago

4 0

Answer:

A. 5.75

Step-by-step explanation:

11.5/2 = 5.75

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A semicircle has an area of 76.97 squared km. Find it’s radius

shtirl [24]

Answer:

7 km

Step-by-step explanation:

Substitute:

The equation for area of a semi-circle is $\frac{r^{2}\pi }{2}$

A = $\frac{r^{2}\pi }{2}$

76.97 = $\frac{r^{2}\pi }{2}$

Multiply by 2 on both sides:

2(76.97) = ( $\frac{r^{2}\pi }{2}$ )2

153.94 = $r^{2} \pi$

Divide by pi on both sides:

153.94 = $r^{2} \pi$

/pi /pi

49.03 ≈ $r^{2}$

Find the square root:

$\sqrt{49.03} =\sqrt{r^{2} }$

7 = r

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3 years ago

Help please im lost and not good in math

Damm [24]

Answers: a = 49
b = 10
c = 105

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3 years ago

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A 2400 gallon pool is being filled at a rate of 40 gallons per minute. At this rate, how many minutes will it take to fill this

ira [324]

After 30 minutes the pool will be half full

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A square has a perimeter of 40cm what is the length of each side

docker41 [41]

Answer:

length of each side : 10 cm

Step-by-step explanation:

all sides of squares are equal

thus, 4 sides = 40 cm

1 side = 40/10 cm

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What number is 15% of 60

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0.15 * 60 = 9 or 15/100 * 60/1 = 900/100 = 9

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4 years ago

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