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3 years ago

A bag contains 9 blue marbles and 36 green marbles. If a representative sample contains 3 blue

Mathematics

1 answer:

Nady [450]3 years ago

6 0

Answer:

<h2>It is 12 green marbles</h2>

Step-by-step explanation:

$\frac{9}{3} = 3 \\ \\ \frac{36}{x} = 3 \\ x = \frac{36}{3} \\ x = 12$

I hope that is useful for you :)

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Give two ways to write an expression as a phrase 6+ P

dangina [55]

1. P+(3x2)

2. P+3+3

I hope this helps!

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3 years ago

Given a soda can with a volume of 36 and a diameter of 4, what is the volume of a cone that fits perfectly inside the soda can?

Tomtit [17]

First we need to find the heigh of the soda can be rearanging the volume formula, $V = pi * r^2* h$ . We can make that $h = \frac{V}{pi * r^2}$ We know that V is 36 and radius is half of the diameter, so radius is 2. $h = \frac{36}{pi * 2^2}$
$h = \frac{36}{pi * 4}$
h = 2.87

Now, we can use the height to figure out the volume of a cone. The volume of a cone is $V = pi * r^2 * \frac{h}{3}$
R is 2 again and h is 2.87
$V = pi * 2^2 * \frac{2.87}{3}$
$pi * 4 * .96$
12.56*.96 = 12.0576
So a cone with a volume of 12.0576 is the largest that will fit into the soda can

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4 years ago

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What is the median of the scores<br> 61 67 69 73 77 78 78 80 81 81 81 86 91 92 92 95 99 100 100

goldenfox [79]

Answer:

Step-by-step explanation:

Median is the middle number of a given group of numbers when arranged from highest to lowest or from lowest to highest .

The group of numbers given are arranged from lowest to highest. The middle number in the group is 81

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3 years ago

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What is the sum of the finite arithmetic series 4+8+12+16...+76

Alexxx [7]

A(n)=4+4(n-1)

a(n)=4+4n-4

a(n)=4n

76=4n

n=19

The sum of any arithmetic sequence (series are infinite) is:

(a+a(n))(n/2)

The average of the first and last terms times the number of terms, in this case we found that n=19 so:

19(4+76)/2=760

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3 years ago

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Marina saved $80 from her babysitting job. She wants to buy some shirts and pants that are on sale at her favourite store for $1

Orlov [11]

Answer:

Step-by-step explanation:

Total amount of money that Marina saved from her babysitting job is $80.

She wants to buy some shirts and pants that are on sale at her favourite store for $17 each. To determine how many items of clothing that she can buy, we would divide the total amount that she saved by the cost of each clothing. It becomes

80/17 = 4.7.

Since the number of clothing must be whole number, the number of clothing that she can buy would be 4

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3 years ago