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notka56 [123]
3 years ago
5

The circumference of circle x in which a = 49pi in squared

Mathematics
1 answer:
zzz [600]3 years ago
8 0

Answer:

C = 14 pi inches

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

49 pi  = pi r^2

Divide each side by pi

49 pi/pi = pi /pi r^2

49 = r^2

Take the square root of each side

7 = r

The circumference is given by

C = 2 * pi *r

C = 2 * pi *7

C = 14 pi inches

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1/2

Step-by-step explanation:

Pick two points on the line

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What is the ratio of 420m to 1 km
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Answer:

21/50 or 21:50

Step-by-step explanation:

1km = 1000m

That means one meter is equal to 1/1000 of a km.

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A customer buys a CD for $15 and a video game. The customer pays a total of $42.80 for the two items, which includes 7% sales ta
kari74 [83]

Answer:

1.07 (15 + x) = 42.80

Step-by-step explanation:

Given data

CD= $15

Let the cost of the video game be x

The total cost= 15+x

Hence the equivalent expression is

1.07 (15 + x) = 42.80

open bracket

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x= 26.75/1.07

x= 25

Check

7% tax for CD

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total =1.05+15

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7% tax for Video game

=0.07* 25

=1.75

total =1.75+25

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=26.75+16.05

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3 years ago
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