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bekas [8.4K]
3 years ago
9

The radius of a sphere is 5 feet. Find the area of the great circle of this sphere. (The great circle is the largest circle cros

s section.)
Question 15 options:

25π

125π

625π

5π
Mathematics
1 answer:
antiseptic1488 [7]3 years ago
7 0
Easy
the radius is  the same

area=pir^2
r=5
area=pi5^2
area=25pi

1st option
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Answer:

1279.3 cubic inches (Rounded to the nearest tenth)

Step-by-step explanation:

Side of a cubic box = 12 inches

volume of cubic box = side^3   (since side is equal to 12 inches)

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It means that box can be filled with 1,728 cubic inches of any material

____________________________________________________

But, it is given that it has one basketball placed in it.

hence we need to find the volume of basketball .

Since basket ball is spherical in shape

formula to calculate its volume will be same as that of formula to calculate volume of sphere

volume of sphere = (4/3 ) \pi r^3\\  where r is the radius of sphere

radius of basketball = diameter/2 =  9.5/2 in = 4.75 inches

therefore volume of basket ball is given by

volume of basketball = (4/3 ) \pi r^3\\\\\\=>(4/3 ) \3.14* 4.75^3\\\\\\= 448.693 \ cubic \ inches

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In box with volume 1,728 cubic inches,, 448.693 cubic inches is occupied by basketball.

It means rest is empty which can be filled with foam.

To calculate the empty space, we subtract volume of basket ball from volume of box

volume of empty space = volume of box  -  volume of basket

 = 1728 - 448.693 = 1279.307 cubic inches

1279.307 cubic inches in nearest tenth will be  1279.3 cubic inches.

Hence, 1279.3 cubic inches of foam are needed to fill the rest of the box

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4 years ago
There are 60 members in the school glee club.the glee club needs to raise at least $5,000 for a trip to a national competition.t
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4,000 more dollars. Because if each class needs 5,00 then 1,000 + 4,000 equals 5,000. 60*something is 5,000.
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1 is 3/3. 3/3 + 1/3 = 4/3.
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enyata [817]

Answer:

36 years old (jim)

Step-by-step explanation:

looks like a good ol' word problem!

first, if you don't know what to do, always assign variables

Jim's age: x+9

June's age: x

Alex's age: x-8

we know the sum of their ages which is 82

so, x+9+x+x-8=82

simplify

3x+1=82

3x=81

x=27, but we're not done yet

Now we know x

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june: 27

Alex: 21

so the oldest is jim at 36

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Answer:

the answer is 7

Step-by-step explanation:

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