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evablogger [386]

3 years ago

13

You select a marble without looking and then put it back. If you do this 60 times, what is the best prediction possible for the

number of times you will pick a blue or a purple marble?

1 answer:

scoundrel [369]3 years ago

4 0

Answer:

There is a 1/20 chance.

Step-by-step explanation:

60 times would be 1/60.But that would be 1 and there are two marbles.So there is a 1/20 chance

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78 square ft, height is 6ft what is the base

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67 2 3 % of the animals at an animal shelter are dogs. About what fraction of the animals at the shelter are dogs?

Strike441 [17]

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About 2/3 of the animals at the shelter are dogs

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4 0

3 years ago

A circular pond 24 yd in

Schach [20]

Answer:

The walk will cost $8164.

Step-by-step explanation:

Given:

Diameter of the circular pond (D) = 24 yd

Width of the gravel path (x) = 2 yd

Cost per yard of the path = $50

Now, radius of the circular pond is half of the diameter and is given as:

$Radius,R=\frac{D}{2}=\frac{24}{2}=12\ yd$

Now, area of the pond is given as:

$A_{pond}=\pi R^2=3.14\times (12)^2=3.14\times 144=452.16\ yd^2$

Area of the complete path including the pond area is given as:

$A_{outer}=\pi(R+x)^2=3.14\times(12+2)^2=3.14\times196=615.44\ yd^2$

Now, area of the gravel path can be obtained by subtracting the pond area from the total outer area. This gives,

$A_{path}=A_{outer}-A_{pond}\\\\A_{path}=615.44-452.16=163.28\ yd^2$

Now, using unitary method,

Cost of 1 square yard of path = $50

∴ Cost of 163.28 square yard of path = 50 × 163.28 = $8164

Hence, the walk will cost $8164.

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3 years ago

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