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zhannawk [14.2K]
2 years ago
12

A railroad crossing sign has a diameter of 30 inches. what is the area of the sign?

Mathematics
2 answers:
WITCHER [35]2 years ago
6 0

Answer:

about 706.5 or 706.86

Step-by-step explanation:

to find this answer we need to use the area formula of a circle which is A = πr ^2

we know the diameter is 30, and the radius is half the of diameter, so we take 30 and divide it by 2, which should give us 15 for the radius. ( 30/2 = 15, so r = 15)

depending on how your teacher wants u to answer this you can use π on a calculator or use 3.14

now just plug in your numbers to formula

A = 3.14 * 15^2 or A = π * 15^2

and should equal about 706.5 or 706.86 (depending on if you use 3.14 or π)

Anna007 [38]2 years ago
5 0

Answer:

706.5m^2

Step-by-step explanation:

The sign is a circle

Area of a circle is (pi)r^2

d = 30 in -> r = d/2  = 30/2 = 15

Area = 3.14 x (15)^2 = 706.5m^2

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Answer:

x = \frac{25}{6}

Step-by-step explanation:

Given expression is,

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2 years ago
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Read 2 more answers
The width of a rectangle is 2 inches less than its length. If the perimeter of the rectangle is 96 inches, what is its width?
Hatshy [7]

Answer:

Step-by-step explanation:

a) Perimeter of a rectangle = 2 *(L +w)

b) w = L - 2  

Answer: B

c)  Perimeter =  96 inches

2* (l +w)  = 96

2*( L + L - 2 ) = 96               {Combine like terms}

2 * (2L - 2) = 96          {use distributive law}

 2*2L - 2*2 = 96

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        4L/4  = 100/4

L =  25 inches

d) w = L - 2

        = 25 - 2

w = 23 inches

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3 years ago
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