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Mila [183]
3 years ago
10

A local carpet company has been hired to carpet a planetarium which is in the shape of a circle. If the radius of the planetariu

m is six yards, and the cost of the carpet is $14 per square yard, find the total cost to carpet the planetarium. (use 3.14 for π )
Mathematics
1 answer:
dem82 [27]3 years ago
7 0

We are given radius = 6 yards

area of circle = pi * r * r = 3.14 * 6*6 = 113.04 yard square

cost of carpet is $14 per square yard

cost of 113.04 square yard = 14*113.04= 1582.56 dollars

Answer: cost to carpet the planetarium is $1582.56

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4 0
4 years ago
I need to find surface area of a cylinder. Formula being used: S.A= L x W +
Arturiano [62]

Answer:

90π yd²

Step-by-step explanation:

the surface area of a cylinder is the sum of the lateral area and twice the aera of one end of the cylinder:  π·d·l, where l represents the length of the cylinder.  Here, the lateral surface area is π·6 yd·12 yd, or 72π yd².

The two ends add the following to the total surface area:

2·π·(d/2)², or 2π·d²/4.

Thus, the total surface area of the cyl. is

A = 2π·(6 yd)²/4 + 72π yd², or

A = 18π yd² + 72π yd² = 90π yd²

Note:  Please check your source.  L x W +  2pi ·r ^2 is incorrect.

5 0
4 years ago
Sue has $2.20 in dimes and nickels. If she has 13 more dimes than nickels, how many of each coin does she have?
dem82 [27]
10d+5n=220
divide both sides by 5
2d+n=44

d=13+n
sub 13+n for d in other equatin

2(13+n)+n=44
26+2n+n=44
26+3n=44
minus 26 both sides
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divide both sides by 3
n=6
sub back

d=13+n
d=13+6
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4 0
3 years ago
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inessss [21]

Answer:

Step-by-step explanation:

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6 0
3 years ago
Help I'm not comfortable with negative numbers
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B) < because the more negative or the farther away from zero a number is the smaller it is 
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d) = because anytime you multiply a negative by positive your answer will always be negative

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8 0
3 years ago
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