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Umnica [9.8K]
3 years ago
14

cliff collects marbles. 1/2 of his collection is blue. of the blue marbles 1/2 of these are a dark blue. how much of cliff's mar

bles collection is dark blue.​
Mathematics
1 answer:
IgorLugansk [536]3 years ago
6 0

Answer:

25%

Step-by-step explanation:

50% of marbles are blue.

Half of 50% is 25%.

For example:

You have 100 marbles. Half are blue, so fifty marbles are blue. Half of those 50 marbles are dark blue, so 50÷2 is 25. 25 is 1/4 of 100, which is also 25%.

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A textbook search committee is considering 13 books for possible adoption. The committee has decided to select 3 of the 13 for f
laiz [17]

Number of ways in which the 3 can be selected from 13  = 286

Step-by-step explanation:

Step 1:

Number of books considered by the textbook search committee = 13

Number of books selected from this 13 = 3

We need to determine number of ways in which the 3 can be selected from the 13

Step 2 :

The order of the 3 books selected does not matter. So,

Number of ways in which the 3 books can be selected from 13 books =  C(13,3) = \frac{13!}{10! . 3!}

                                                                                             =\frac{ 13 . 12 .11  . 10!}{10! . 3! }

                                                                                             =\frac{1716}{6} = 286

Step 3 :

Answer :

Number of ways in which the 3 can be selected from 13  = 286

                                                                 

8 0
3 years ago
What is 8x+9x simplified completely
Zigmanuir [339]
17x
Add coefficients
7 0
4 years ago
Read 2 more answers
Find the area of a circle with the circumference 32pi
Stella [2.4K]

Answer:

A=πr2

C=2πr

Solving forA

A=C2

4π=322

4·π≈81.48733

5 0
3 years ago
A company has recently been hiring new employees. Today the company has 29% more employees than it did a year ago. If there are
mezya [45]

Answer:

27477

Step-by-step explanation:

Subtract 38700 from 29% = 27477.

5 0
2 years ago
Zach wants to build a slanted skateboard ramp. He knows he wants the ramp to form a 15 degrees angle with the ground and be 4 fe
Fynjy0 [20]

Answer: The ramp would be 15.5 feet long.

Step-by-step explanation: Please refer to the attached diagram for details.

Angle C shows the angle to be formed by the ramp from the ground, which is 15 degrees. Also, from the ground, it’s going to be four feet tall, which is line AB. The top of the ramp is point A, which makes line AC the entire length of the ramp. Since we have a reference angle (angle C) and two sides, the opposite and the hypotenuse, we shall apply the trigonometric ratio.

SinC = opposite/hypotenuse

Sin 15 = 4/b

By cross multiplication we now have

b = 4/Sin15

b = 4/0.2588

b = 15.4599

Approximately b = 15.5

Therefore the length of the ramp would be 15.5 feet

6 0
3 years ago
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