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2 years ago

The diameter of a circle 8 centimeters. What is the circles area?use 3.14 for n

Mathematics

1 answer:

DIA [1.3K]2 years ago

3 0

Answer:

50.24 cm^2

Step-by-step explanation:

Area = Pi r^2

A = (3.14) (4^2)

A = 50.24 cm^2

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Find the distance d.Assume that the ratio of d to 120 ft is the same as the ratio of 50 ft to 40 ft

dalvyx [7]

Answer:

since it says implied it would be D. assumed

Step-by-step explanation:

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3 years ago

What is a scaled copy?

ELEN [110]

Answer:

A scale copy of a figure is a figure that is geometrically similar to the original figure.

Step-by-step explanation:

Hope this makes sense.

7 0

2 years ago

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Nata [24]

Answer:

(sqrt(x) +1)(sqrt(x)-2)

Step-by-step explanation:

$x - 2 \sqrt{x} + \sqrt{x} - 2 \\ \sqrt{x} ( \sqrt{x} - 2) + 1( \sqrt{x} - 2 ) \\ ( \sqrt{x} + 1)( \sqrt{x} - 2)$

4 0

2 years ago

Using the quadratic formula, what is the value of x for x^2-4+5=0

PSYCHO15rus [73]

value of x is: x= i and x= -i

Step-by-step explanation:

We need to find the value of x from $x^2-4+5=0$ using quadratic formula.

The term is: $x^2+1=0$

The quadratic formula is:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\$

Where a = 1, b=0,c=1

Putting values:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{0\pm\sqrt{(0)^2-4(1)(1)}}{2(1)}\\x=\frac{\pm\sqrt{-4}}{2}\\x=\frac{\pm2i}{2}\\x=\pm i$

So, value of x is: x= i and x= -i

Keywords: Quadratic formula

Learn more about quadratic formula at:

#learnwithBrainly

4 0

3 years ago

What is the surface area of a sphere whose volume is 28811 ins , n

Lina20 [59]

Volume=(4/3)pir^3
volume=288pi
288pi=(4/3)pir^3
divid eobht sides by pi
288=(4/3)r^3
multiply both sides by 3/4 to clear fraction (4/3 times 3/4=12/12=1)
216=r^3
cube root both sides
6=r

surface area=4pir^2
surface area=4pi6^2
surface area=4pi36
surface area=144pi in^2

8 0

3 years ago