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Simora [160]
3 years ago
13

A área do círculo mede 196 π cm². Qual a medida do seu raio?

Mathematics
2 answers:
AleksandrR [38]3 years ago
8 0

Hey there!!

  • The area of a circle = πr²

The area is given as 196π

Hence,

196π = πr²

... r²= 196

... r = √196

... r = 14

<em>Hence, the radius is 14 cm. </em>

<em>Hope it helps!</em>

Rzqust [24]3 years ago
7 0

Answer:


Step-by-step explanation:

The area formula for a circle is A = pi*r^2.  Solve this for the radius (raio):

r^2 = A / pi, or r = plus or minus √(A/pi).

Here, r =  +√(A/pi) = +√( 196 pi cm^2   /   pi ) = +7.9 cm.

Check:  A = pi*r^2.  Does pi*(7.9 cm)^2 = pi*196 cm^2?   Yes.

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10% of the students in a school like the color purple. 162 students don't like the color purple. How many students are in the sc
egoroff_w [7]

Answer:

There are 180 students at the school

Step-by-step explanation:

If 10% of the students like the color purple, then 100-10 = 90% do not like the color purple.

Students * percentage that do not like = students that do not like

students * 90% = 162

Change to decimal form

students *.90 = 162

Divide each side by .90

students *.90/.90 = 162/.90

students = 180

There are 180 students at the school

5 0
3 years ago
The perimeter of a rectangle is 99 inches. It’s width is 11 inches. What is the length of the rectangle? Solve algebraically and
Crank
2 (11)+2x=99
22+2x=99
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3 0
3 years ago
A student writes "the quotient of 5 and x" to describe the algebraic expression -
pashok25 [27]

For this case we have to:

\frac {a} {b} = c

Where:

a: It's the Dividend

b: It is the Divider

c: Is the Quotient

Thus, the expression "the quotient of 5 and x" can be represented as:

\frac {5} {x} = y

Where "y" is the quotient of 5 and x.

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5 0
3 years ago
Meg surveyed some students at her school about their favorite professional sports. Of the students surveyed, 2 said football was
elixir [45]

Answer:

\frac{1}{5}

Step-by-step explanation:

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4 0
2 years ago
Read 2 more answers
Which of these is equivalent to 3π/5 rad ? A) 108° B) 150° C) 216° D) 300°
Reptile [31]

To convert from radians to degrees multiply by 180 / π, So:-

3 π / 5 =  180 * 3 * π /  5π

= 540 / 5

= 108 degrees  answer


3 0
3 years ago
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