Find the circumference of each circle, use 3.14 for . Include units and round to the nearest tenth. Show work
1 answer:
Answer:
Answer:-
a) <em>The circumference of the circle C = 21.98 m</em>
<em>b) The circumference of the circle C = 37.68 ft</em>
<em>c) The circumference of the circle C = 40.82 km</em>
<em>d) The radius of the circle = r = 11 c.m</em>
<em> The Diameter of the circle 'd' = 2(r) = 2(11) =22 c.m</em>
<em>e) The circumference of the circle = 21.98 inches</em>
<em> </em><u>Step-by-step explanation</u>:
a) In First diagram
Given radius of the circle 'r' = 7.1 m
<em> The circumference of the circle C = 2πr</em>
C = 2 (3.14) (7.1)
C = 21.98 m
<em> The circumference of the circle C = 21.98 m</em>
b) In second diagram
Given diameter of the circle 'd' = 12 ft
The circumference of the circle C = 2πr
C = π(2 r)
Diameter = 2 X radius
d = 2 r
The circumference of the circle C = πd
C = 3.14 ×12
<em> The circumference of the circle C = 37.68 ft</em>
<em>c) </em>
Given diameter of the circle 'd' = 13 km
The circumference of the circle C = 2πr
C = π(2 r)
Diameter = 2 X radius
d = 2 r
The circumference of the circle C = πd
C = 3.14 ×13
<em>The circumference of the circle C = 40.82 km</em>
7) The circumference of the circle C = 2πr
Given The circumference of a circle is 34.54 cm
Now 2πr = 34.54
2(3.14) r = 34.54
<em> The radius of the circle = r = 11 c.m</em>
<em> The Diameter of the circle 'd' = 2(r) = 2(11) =22 c.m</em>
8) Given radius of the circle 'r' = 3.5 inches
The circumference of the circle C = 2πr
C = 2 (3.14) (3.5)
C = 21.98
<em>The circumference of the circle = 21.98 inches</em>
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Answer:
Step-by-step explanation:
The correct question is
Susan works as a tutor for $10 and hour, and as a waitress for $11 an hour. This month, she worked a combined total of 90 hours at her two jobs. Let t be the number of hours Susan worked as a tutor this month. Write an expression for the combined total dollar amount she earned this month
Let
t -----> the number of hours that Susan work as a tutor
y ----> the number of hours that Susan work as a waitress
z ---> the combined total dollar amount she earned this month
we know that
-----> equation A
we know that
The combined total dollar amount she earned this month is equal to the number of hours that Susan work as a tutor multiplied by $10 plus the number of hours that Susan work as a waitress multiplied by $11
----> equation B
substitute equation A in equation B
therefore
The expression for the combined total dollar amount is $(990-t)