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Let’s check out your problem:
Find the
area of a circle
with a circumference of
18
18
18
.
84
84
84
units.
\newline
□
\square
□
units
2
^{2}
2
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Math Problems
Grade 8
Evaluate powers with negative exponents
Full solution
Q.
Find the area of a circle with a circumference of
18
18
18
.
84
84
84
units.
\newline
□
\square
□
units
2
^{2}
2
Question Prompt:
question_prompt: What is the area of a circle if its circumference is
18.84
18.84
18.84
units?
Step
1
1
1
:
Step
1
1
1
: Use the circumference to find the radius.
\newline
Circumference formula
:
C
=
2
⋅
π
⋅
r
C = 2 \cdot \pi \cdot r
C
=
2
⋅
π
⋅
r
\newline
18.84
=
2
⋅
π
⋅
r
18.84 = 2 \cdot \pi \cdot r
18.84
=
2
⋅
π
⋅
r
\newline
r
=
18.84
2
⋅
π
r = \frac{18.84}{2 \cdot \pi}
r
=
2
⋅
π
18.84
Step
2
2
2
:
Step
2
2
2
: Calculate the radius.
\newline
r
=
18.84
2
×
3.14
r = \frac{18.84}{2 \times 3.14}
r
=
2
×
3.14
18.84
\newline
r
=
18.84
6.28
r = \frac{18.84}{6.28}
r
=
6.28
18.84
\newline
r
=
3
r = 3
r
=
3
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Question
Evaluate the expression.
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