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malfutka [58]
3 years ago
5

the ratio of the weight of a book to the weight of a mug is 7:5 what fraction of the total weight of the book and mug is the wei

ght of the book?
Mathematics
1 answer:
Elena-2011 [213]3 years ago
7 0
12:7
because you add 7 and 5 and then there is the 7 for the book weight
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The complete question is
Three tennis balls are stored in a cylindrical container with a height of 8 inches and a radius of 1.43 inches. The circumference of a tennis ball is 8 inches. a) Find the volume of a tennis ball b) There are 3 tennis ball in the container Find the amount of space within the cylinder not taken up by the tennis balls. Round your answers to the nearest hundredth.

Part a) 

we know that
length of a circumference=2*pi*r----------> r=length/(2*pi)---> 8/(2*pi)
r=1.27 in------> radius of tennis ball

volume of a tennis ball is equals to the volume of a sphere
[volume of a sphere]=(4/3)*pi*r³----> (4/3)*pi*1.27³---> 8.58 in³

the answer Part a) is
the volume of a tennis ball is 8.58 in³

Part b)
[volume of the container]=pi*r²*h-----> pi*1.43²*8----> 51.39 in³

[volume of 3 tennis balls]=8.58*3-----> 25.74 in³

the amount of space within the cylinder not taken up by the tennis balls is
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the answer Part b) is
25.65 in³


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3 years ago
There are 63 seats in the first 3 rows of the auditorium. How many seats are there in only 1 row? How many seats are
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Answer:

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Step-by-step explanation:

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Since the line is continuous and the shading is below this line the inequality sign is 'less than or equal to',  ≤.

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