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2 years ago

Harrison has 40 CDs in his music collection.

Mathematics

2 answers:

HACTEHA [7]2 years ago

4 0

Answer:

20 of the cds are pop

12 are country

That leaves 8 cds that are other types of music.

Step-by-step explanation:

vova2212 [387]2 years ago

3 0

Answer:

There are 8

Step-by-step explanation:

Since the percentage of pop music is 50, and there are 40 CDs, we can see that 20 are pop

if we do 40(.30) we get 12

12+20=32

40-32=8

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Sergio is working on a research project involving the ages of students at Brooklyn College. After interviewing 500 students, he

Zinaida [17]

Answer:

The probability of of a randomly chosen student being exactly 21 years old.

= 1.293

Step-by-step explanation:

Step(i):-

Given Population size n = 500

Mean of the Population = 20 years and 6 months

= $20 + \frac{6}{12} = 20 +0.5 = 20.5 years$

Standard deviation of the Population = 2 years

Let 'X' be the range of ages of the students on campus follows a normal distribution

Let x =21

$Z = \frac{x-mean}{S.D}$

$Z = \frac{x-mean}{S.D} = \frac{21-20.6}{2} =0.2$

The probability of a randomly chosen student being exactly 21 years old.

P( Z≤21) = 0.5 + A( 0.2)

= 0.5 +0.793

= 1.293

6 0

2 years ago

Why is ti that when you add two numbers together (5+5,6+6,3+3, etc.) you get an even sum?? I need this for my 8 year-old-brother

astra-53 [7]

Essentially, the rule goes as so: odd + odd = even, even + even = even.

Although that may not be the answer you're looking for, it is a math rule that is never debunked and essentially the premises for why you get an even sum practically always depending on the numbers.

Hope this helps!

3 0

2 years ago

Read 2 more answers

What is 5/3 converted into a decimal?

stepan [7]

It would be, 1.66666667

6 0

2 years ago

What is the value of x if gx-1 -2- 25?

natka813 [3]

Answer:

do you mean gx-1-2=25?

and what does g equal?

Step-by-step explanation:

8 0

2 years ago

Brandon spends $25.30 on 2 large containers of popcorn and 4 large drinks. A large container of popcorn costs $5.25. What is the

Paladinen [302]

Answer:

$3.70

Step-by-step explanation:

$25.30 = 2P + 4D. p for popcorn and d for drinks

P= $5.25

$25.30 = 2($5.25) + 4D

$25.30 = $10.50 + 4D

-10.50. -10.50

inverse operations

$14.80 = 4D

÷4. ÷4

Inverse operations

$3.70 = D

5 0

2 years ago