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4 years ago

5

In the continental United States, The ratio of states border an ocean to states that do not border an ocean is 7:9. How many of

the states border an ocean?

1 answer:

luda_lava [24]4 years ago

7 0

The answer is 7 because the first part of the ratio says amount of states that border an ocean.

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Divide. Round to the nearest tenth if necessary. 11.4 divided by 19

Nana76 [90]

11.4 divided by 19 is 0.6

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4 years ago

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PLEASE HELP!!!! I DON'T KNOW THE ANSWERS!!

Alexus [3.1K]

the first one is a

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3 years ago

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aev [14]

Answer:

D. No, because $P(A|B)=0.22$ and the $P(A) = 0.53$ are not equal.

Step-by-step explanation:

Given:

Probability of doing yard work is, $P(A)=53\%=0.53$

Probability of raining, $P(B)=68\%=0.68$

Probability of doing yard work and it raining is, $P(A\cap B)=15\%=0.15$

Now, two events A and B are independent if,

$P(A|B)=P(A);P(B|A)=P(B)$

Conditional probability of event A given that B has occurred is given as:

$P(A|B)=\frac{P(A\cap B}{P(B)}\\P(A|B)=\frac{0.15}{0.68}=0.22$

So, $P(A|B)=0.22\ and\ P(A)=0.53$

Since, $P(A|B)\ne P(A)$ , A and B are not independent events.

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3 years ago

Use a spinner to find the theoretical probability of spinning an even number. What is the theoretical probability of spinning an

stiv31 [10]

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Mary Sue and Betty have 603 necklaces altogether. Mary Sue has 115 more necklaces than Betty. How many necklaces does Betty have

Blizzard [7]

Let Mary Sue have m necklaces and Betty have b necklaces.

And they have 603 necklaces altogether, that is

m + b =603

And Mary Sue has 115 more necklaces than Betty, that is

m=b +115

Substituting this value in first equation we will get

b+115+b=603

Subtracting 115

2b= 488

b= 244

So Betty have 244 necklaces .

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4 years ago