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KengaRu [80]
4 years ago
12

Mrs. McDonnell is making 25 paper cones to fill with popcorn for her daughter's birthday party. 4 inches 7 inches Find the volum

e of one paper cone if the diameter is 4 inches and the height is 7 inches. Round your answer to the nearest cubic inch.
Mathematics
1 answer:
madreJ [45]4 years ago
3 0
The volume of one cone would be 29 in³.

The formula for the volume of a cone is V=(1/3)πr²h.  Substituting our information we have:

V=(1/3)(3.14)(4/2)²(7)

We divide the diameter by 2 because the radius is half of the diameter.  This gives us:
V=1/3(3.14)(28) = 29.306 ≈ 29in³
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Not sure I'm right but:

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How to write 21/6 as a mixed number
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4 0
3 years ago
The sum of the digits of a two-digit number is 9. If the digits are reversed,the new number is 9 more than the original number.F
hodyreva [135]

Answer:

45

Step-by-step explanation:

Let the original number be xy where y is unit and x is tens hence original number is 10x+y When reversed, the new number is yz hence 10y+x

We know that the original number plus 9 is the reversed number hence

10x+y+9=10y+x

9y-9x=9 which when simplified we obtain that

y-x=1 equation 1

Originally, we are told that the sum of x and y is 9 hence

y+x=9 equation 2

Solving equation 1, it means y=x+1

Substituting the above into equation 2

x+1+x=9

2x=9-1

2x=8

x=8/2=4

Since y=x+1 then y=4+1=5

Therefore, the original number, xy is 45

4 0
4 years ago
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