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Advocard [28]
3 years ago
7

15 out of the 25 people at the park were children. what fraction of the people at the park were adults

Mathematics
1 answer:
Anni [7]3 years ago
3 0
2/5 people were adults
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Evelyn's made a cake in the shape of a circus tent the cake consisted of a cylinder and a cone .The height of the cone is half t
Lera25 [3.4K]
The volume of the cake is 1470 in³. 
volume of a cylinder = πr² x height
(Think about how a cylinder is basically a bunch of circles stacked on top of each other. To find the volume, first you need the area of the circle (πr², then you multiply by how many circles you are stacking on top of each other (height)) 

we know the diameter of the cylinder is 12 in. and the radius is half of the diameter. 
half of 12 is 6, therefore the radius is 6 in. or r = 6 
Assuming pi is 3.14, solve for the height of the cylinder
1470 = (3.14)(6²)(height)
1470 = 3.14 x 36 x height
1470 = 113.04 x height
height ≈ 13 in

Now that we know the height of the cylinder is about 13 in., we know the height of the cone, because the problem says that the height of the cone is half the height of the cylinder. 
half of 13 is 6.5, therefore the height of the cone is 6.5 
the radius of the cone is the same as that of the cylinder, 6 in. 

volume of a cone = πr² × (height ÷ 3)

volume of the cone = (3.14)(6²)(6.5 ÷ 3)
volume of the cone = (3.14)(36)(2.16666)
volume of the cone = 244.92 in³

Now all that's left to find the volume of the whole cake is to add the volume of the cylinder to the volume of the cone. 

1470 + 244.92 = 1714.92 in³



6 0
3 years ago
1. For a 30 student speech course, in how many ways can the student be selected to give the first 5 speeches?
liraira [26]

Combination problem:

1) 30 C 5 = 142506

2) 13 C 4 = 715

8 0
3 years ago
Help will mark brainliest!!!!!
disa [49]

Answer:

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Step-by-step explanation:

5 0
3 years ago
I need help with this problem. (Dont mind the answer box ;v;)
natka813 [3]

Answer:

Step-by-step explanation: have you tryed using a table

4 0
3 years ago
Read 2 more answers
mary is making a batch of chocolate chip cookies the recipe calls for 9 cups of flour and 2 4/7 cups of sugar she isshort on flo
Harman [31]

Mary added $24 \frac{1}{2} cups of sugar.

<h3>How to estimate how much sugar should Mary add?</h3>

The ratio of flour to sugar exists at 9 cups: 2 4/7 cups

Utilizing equivalent ratios, given that 7 cups of sugar was utilized,

Let cups of flour needed = x such that our equation becomes

flour/sugar$ =\frac{9}{2\frac{4}{7} }=\frac{x}{7}  

$ \frac{9}{2\frac{4}{7} }=\frac{x}{7}

Convert mixed numbers into improper fractions

$2 \frac{4}{7}= \frac{18}{7}

simplifying the above equation, we get

$\frac{9}{\frac{18}{7} } = \frac{x}{7}

= $24 \frac{1}{2}

x = 24.5

The value of x = 24.5.

Therefore, $24 \frac{1}{2} cups of sugar exist required.

To learn more about improper fractions refer to:

brainly.com/question/387381

#SPJ9

3 0
2 years ago
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