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3 years ago

The radius of a circle is 3 centimeters. What is the circle's area? Use 3.14 for

Mathematics

2 answers:

fomenos3 years ago

7 0

Answer:

≈28.27

Step-by-step explanation:

The equation for the radius of circle - A=π $r^{2}$

plug in numbers - A=π* 3

≈28.27

Dominik [7]3 years ago

5 0

Answer:

28.26 square centimeters

Step-by-step explanation:

The area of a circle is pi*r^2, with pi=3.14.

3.14*3^2=28.26 square centimeters.

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For which equation is y = 7 a solution?

Natasha2012 [34]

Answer:B

Step-by-step explanation:

y - 26 = -19

y + 26 - 26 = -19 + 26

y=7

4 0

3 years ago

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Well's College in New York was previously an all girls school. In 2005, the college began to allow boys to enroll. By 2012, the

kogti [31]

Answer: 150 boys

Step-by-step explanation:

Let the number of boys be x

Since there were 200 more girls than boys, the number of girls will be: = x + 200

Since the ratio of boys to girls was 3:7, this can be solved further below:

3/7 = x/x+200

Cross multiply

(7 × x) = 3(x + 200)

7x = 3x + 600

7x - 3x = 600

4x = 600

x = 600/4

x = 150

The number of boys enrolled is 150

Number of Girls will be:

= X + 200

= 150 + 200

= 350

Check: Number of boys / Number of girls

= 150/350

= 3/7

= 3:7

7 0

3 years ago

Help me all the questions, explain you answers plssssss

BartSMP [9]

Is there a grid that came with the problem?

8 0

3 years ago

30 \div \frac{1}{3} 30÷ 3 1

ioda

Answer:

Step-by-step explanation:

$30 \div \frac{1}{3} \\\\\mathrm{Convert\:element\:to\:fraction}:\quad \:30=\frac{30}{1}\\=\frac{30}{1}\div \frac{1}{3}\\\\\mathrm{Apply\:the\:fraction\:rule}:\quad \frac{a}{b}\div \frac{c}{d}=\frac{a}{b}\times \frac{d}{c}\\=\frac{30}{1}\times \frac{3}{1}\\\\\mathrm{Apply\:rule}\:\frac{a}{1}=a\\=30\times \:3\\\\=90$

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3 years ago

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Solve the proportion 7/5=21/x

Marysya12 [62]

Answer:

=15

Step-by-step explanation:

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3 years ago