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3 years ago

A circle with radius of 2cm sits inside a circle with radius of

Mathematics

1 answer:

Semmy [17]3 years ago

6 0

Answer:

37.70 cm^2

Step-by-step explanation:

area of circle with radius 4 cm = (pi)r^2 = 3.14159 * (4 cm)^2 = 50.27 cm^2

area of circle with radius 2 cm = (pi)r^2 = 3.14159 * (2 cm)^2 = 12.57 cm^2

difference in areas = 37.70 cm^2

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Solve the equation 2x^2-3x-6=0 give your answer correct to two decimal places

IRISSAK [1]

Answer:

Step-by-step explanation:

2x² - 3x - 6 = 0

Using the quadratic formula

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

a = 2 , b = - 3 , c = 6

Substituting the values into the above formula

We have

$x = \frac{ - - 3± \sqrt{ { - 3}^{2} - 4(2)( - 6)} }{2(2)}$

$x = \frac{3± \sqrt{9 +48 } }{4}$

$x = \frac{3± \sqrt{57} }{4}$

$x = \frac{3 - \sqrt{57} }{4} \: \: \: \: or \: \: \: \: \: x = \frac{3 + \sqrt{57} }{4}$

We have the final answer as

Hope this helps you

6 0

3 years ago

Answer this please

Gelneren [198K]

Answer:

x = 48

Step-by-step explanation:

We now that supplementary angles (as is the case for a straight line) add up to 180 degrees.

3x - 12 + x = 180

4x = 192

x = 48

6 0

3 years ago

What is -2x times x i would try to do it myself but i can't

expeople1 [14]

Answer:

-2x times x is -2x^2

Step-by-step explanation:

because you have two x's

Hope This Helps! Have A Nice Day!!

8 0

3 years ago

A circular chicken house has an area of 40m². What length of chicken wire is required to fence the house without any wire left o

Lyrx [107]

Good bless you brother I wish I can help you

8 0

3 years ago

A compact disc has an approximate Radius of 2 3/8 inches, what is the approximate area of a CD

professor190 [17]

Answer:

A≈12.57

r Radius 2

Step-by-step explanation:

6 0

3 years ago