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Find the area of a circle with a radius of 0.8 inches. Use the fact that the area of a circle is given by
A=pir^(2), where
pi~~3.14.
The area of the circle is approximately
◻

◻
(Simplify your answer. Type an integer or decimal rounded to four decimal places as needed.)

Find the area of a circle with a radius of $0$ . $8$ inches. Use the fact that the area of a circle is given by $A=\pi r^{2}$ , where $\pi \approx 3.14$ . $\newline$ The area of the circle is approximately $\square$ $\newline$ (Simplify your answer. Type an integer or decimal rounded to four decimal places as needed.)

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Area of quadrilaterals and triangles: word problems

Full solution

Q. Find the area of a circle with a radius of

0

.

8

inches. Use the fact that the area of a circle is given by

A=\pi r^{2}

, where

\pi \approx 3.14

.

\newline

The area of the circle is approximately

\square

\newline

(Simplify your answer. Type an integer or decimal rounded to four decimal places as needed.)

Identify formula: Step $1$ : Identify the formula to use for calculating the area of a circle. $\newline$ The formula is $A = \pi r^2$ , where $\pi$ (pi) is approximately $3.14$ and $r$ is the radius of the circle.
Plug values: Step $2$ : Plug in the values into the formula. $\newline$ Radius $r$ = $0.8$ inches. $\newline$ $A = 3.14 \times (0.8)^2$
Calculate square: Step $3$ : Calculate the square of the radius. $\newline$ $(0.8)^2 = 0.64$
Multiply by pi: Step $4$ : Multiply the result by $\pi$ to find the area. $A = 3.14 \times 0.64 = 2.0096$

More problems from Area of quadrilaterals and triangles: word problems

Question

Skyler climbs a watchtower to guard against forest fires.

\newline

R(h)=\sqrt{13h}

gives the distance, in kilometers, that Skyler can see when their eyes are

h

meters above the ground.

\newline

A(d)=\pi d^{2}

gives the area, in square kilometers, that Skyler can guard when they can see a distance of

d

\newline

Which expression models the area Skyler can guard when their eyes are

h

meters above the ground?

\newline

1

\newline

13\pi h

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13\pi h^{2}

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\sqrt{13\pi h^{2}}

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169\pi h^{2}

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Question

After the outbreak of a mysterious disease, the average wait time at a hospital increased by

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. Before the outbreak, the average wait time at the hospital was

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\newline

Which of the following expressions could represent the average wait time at the hospital after the outbreak?

\newline

2

\newline

0.7m

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m+70

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Question

The radius of a semicircle is

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\newline

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\newline

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Question

\newline

A man has bent a circular wire of radius

49\text{cm}

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\newline

A)100\text{cm}

\newline

B)50\text{cm}

\newline

C)98\text{cm}

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Question

A quarter is worth

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and a half dollar is worth

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\newline

a. A quarter has a diameter of

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inch and a height of

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\newline

b. A half dollar has a diameter of

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inches and a height of

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Question

The hypotenuse of a right triangle measures

17 \mathrm{~cm}

and one of its legs measures

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\newline

\square

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Question

One of the legs of a right triangle measures

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and its hypotenuse measures

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\newline

\square

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Posted 9 months ago

Question

One of the legs of a right triangle measures

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and the other leg measures

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. Find the measure of the hypotenuse. If necessary, round to the nearest tenth.

\newline

\square

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Question

Find the volume of a right circular cone that has a height of

7.4 \mathrm{~cm}

and a base with a radius of

8.1 \mathrm{~cm}

. Round your answer to the nearest tenth of a cubic centimeter.

\newline

\mathrm{cm}^{3}

Posted 9 months ago

Question

Find the volume of a right circular cone that has a height of

13.3 \mathrm{ft}

and a base with a diameter of

9.4 \mathrm{ft}

. Round your answer to the nearest tenth of a cubic foot.

\newline

\mathrm{ft}^{3}

Posted 9 months ago

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