3 years ago

Answer number two please!

Mathematics

2 answers:

Julli [10]3 years ago

8 0

Answer:

100ft^2

Step-by-step explanation:

4*5^2

ruslelena [56]3 years ago

5 0

The answer is 100 ft

If each box has sides of 5 feet, you will do 5 times 5

Each box comes to 25 feet.

Since there are 4 boxes you then do 25 times 4 which is 100.

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An urn contains 13 red balls and 7 blue balls. Suppose that three balls are taken from the urn, one at a time and without replac

d1i1m1o1n [39]

Answer:

0.749

Step-by-step explanation:

The probability that at least one of the three taken balls is blue is the inverse of the probability that none of the three taken balls is blue, aka all 3 of the taken balls are red. The probability of this to happen is

In the first pick: 13/20 chance of this happens

In the 2nd pick: 12/19 chance of this happens

In the 3rd pick: 11/18 chance of this happens

So the probability of picking up all 3 red balls is

$\frac{13*12*11}{20*19*18} = \frac{1716}{6840} = 0.251$