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ArbitrLikvidat [17]
3 years ago
11

W

Mathematics
1 answer:
konstantin123 [22]3 years ago
5 0
Can you post the picture of the exercise
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Suppose that nine-digit Social security numbers are assigned at random. If you randomly select a number, what is the probability
Rina8888 [55]

Answer:  0.3 .

Step-by-step explanation:

The digits in number system = 10      ( 0 to 9)

The total different nine-digit Social security numbers  = 10^9  [By Fundamental counting principle]

=1,000,000,000   = 1 billion

Total people in united state = 300 million = 300, 000 ,000

Since each person In US have equal chance to get chosen.

Therefore , if a number is selected randomly  , then the probability that it belongs to one of the 300 million people in the United States :-

=\dfrac{300, 000 ,000}{1,000, 000 ,000}=0.3

Hence, the required probability is 0.3 .

6 0
3 years ago
If f(x) = 3(x + 4), find f(2).<br><br> 729<br> 243<br> 81<br> 18
bonufazy [111]

The answer is 18.

Just replace the x with 2

7 0
3 years ago
Read 2 more answers
3. A positive number is 56 less than its square. Find the number.
raketka [301]

Answer:8

Step-by-step explanation:

X+56=x^2

X^2-x-56=0

X^2-8x+7x-56=0

X(x-8)+7(x-8)=0

(X+7)(x-8)=0

X+7=0 or x-8=0

X=-7 or x=8

4 0
4 years ago
How to write 3 9/100 as a decimal?
Artemon [7]
3 9/100 would be written as a decimal like this, 3.09. You say three and nine one hundredths. The 9 has to be in the hundredths place, so you put a 0 in front of it. And since the 3 is hole, you put it in front of the decimal point.
6 0
3 years ago
Read 2 more answers
the ratio of rock music to total CDs that Ella own is 25/40 polo has 50 rock music CDs the ratio of rock music to total CDs in h
cluponka [151]
If Polo has n CDs, then \frac{50}n=\frac{25}{40} hence n=\frac{50\cdot40}{25}=80

Hence, they have a total of 80+40=\boxed{120\text{ CDs}}
4 0
3 years ago
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