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3 years ago

Find the area of a circle

Mathematics

2 answers:

PtichkaEL [24]3 years ago

7 0

Answer:

28.26 square feet

Step-by-step explanation:

Area of a circle is: $A=\pi r^2$

'r' is the radius.

We are given the diameter of 6ft. Since the diameter is twice the radius, the radius is 3 ft.

6/2 = 3

Using 3.14 for pi:

$A=3.14*3^2\\\rightarrow 3^2=9\\A=3.14*9\\\boxed{A=28.26}$

The area of the circle should be 28.26 square feet.

Anna11 [10]3 years ago

5 0

Answer:

28.26 ft²

Step-by-step explanation:

If the diameter is 6 feet, then the radius is 3 feet since 2r=d

The area formula in this case is 3.14×r² since it says "Use 3.14 for π".

3.14×3²=

3.14×9=

28.26 ft²

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2 years ago

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Note:

Graphing From An Equation:

Equation are frequently written in slope-intercept form { y = mx+b}.

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Solutions to linear equations contain any points located on the graphed line.

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2 years ago

On a certain hot summer's day, 321 people used the public swimming pool. The daily prices are $1.75 for children and $2.00 for a

Paul [167]

Answer:

31 children and 290 adults

Step-by-step explanation:

Let a = number of adults and c = number of children.

a + c = 321

2a + 1.75c = 634.25

Multiply both sides of the the first equation by -2 and add it to the second equation.

-2a - 2c = -642

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--------------------------------------

-0.25c = -7.75

Divide both sides by -0.25

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Use the first equation to find a.

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Substitute 31 for c.

a + 31 = 321

Subtract 31 from both sides.

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Answer: 31 children and 290 adults

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3 years ago

Read 2 more answers