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torisob [31]
2 years ago
15

Scott has eight CDs, and he picks two to take to work each day. How many different ways can Scott choose two CDs?

Mathematics
2 answers:
blondinia [14]2 years ago
5 0

Answer:

The total number of ways to select 2 CDs from 8 CDs is 28.

Leokris [45]2 years ago
3 0
He can choose them 28 different ways
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BRAINLIEST!!
Nesterboy [21]

Answer:

74.5%

Step-by-step explanation:

The total number of people sampled is 1000 people.

There are 745 people who where corrective lenses.

Percent is (part)/(whole); in this case, the part is 745 and the whole is 1000, so:

745/1000 = 74.5%

Thus, the answer is 74.5%.

Hope this helps!

7 0
3 years ago
Read 2 more answers
Given c=(2.4,0.45) and d = (7,-4) find the direction of 5c+4d
kakasveta [241]

Answer:

The direction of 5c + 4d is approximately 19.0° clockwise with

the positive part of x-axis

Step-by-step explanation:

* Lets talk about the direction of a vector

- If the vector is (x , y), then  

# Its magnitude is √(x² + y²)

# Its direction is tan^-1 (y/x)

- The direction is the angle between the positive part of x-axis and  

  the vector

* Lets solve the problem

∵ c = (2.4 , 0.45) and d = (7 , -4)

- To find 5c + 4d , multiply the two coordinates of c by 5 and the two

  coordinates of d by 4

# Multiply c by 5

∴ 5c = [5(2.4) , 5(0.45)]

∴ 5c = (12 , 2.25)

# Multiply d by 4

∴ 4d = [4(7) , 4(-4)]

∴ 4d = (28 , -16)

- Lets add 5c and 4d

∴ 5c + 4d = (12 , 2.25) + (28 , -16)  

∴ 5c + 4d = [(12 + 28) , (2.25 + -16)]

∴ 5c + 4d = (40 , -13.75)

- The vector is in the 4th quadrant because the x-coordinate is

 positive and the y-coordinate is negative

* Find the direction of 5c + 4d

∵ The direction is tan^-1 (y/x)

∴ The direction is tan^-1 (-13.75/40) = -18.97°

* The direction of 5c + 4d is approximately 19.0° clockwise with

 the positive part of x-axis

3 0
3 years ago
A right rectangle prism is 6 cm by 14 cm by 5 cm what is the surface area of the right prism
NeX [460]

Answer:

\large\boxed{S.A.=368\ cm^2}

Step-by-step explanation:

The formula of a surface area of a rectagular prism:

S.A.=2(lw+lh+wh)

l - length

w - width

h - height

We have the dimensions 6cm × 14cm × 5cm. Substitute:

S.A.=2(6\cdot14+6\cdot5+14\cdot5)=2(84+30+70)=2(184)=368\ cm^2

8 0
3 years ago
Do male and female servers work the same number of hours? A sample of 25 female servers worked an average of 26 hours per week,
Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

Given that

Group   Group One     Group Two  

Mean       26.00 23.00

SD                 2.00 4.00

SEM         0.40 1.21

N                     25     11    

where group I represents female servers and group II male servers.

We have to calculate confidence interval for 90% for difference in means

The mean of Group One minus Group Two equals 3.00

df = 34  

 standard error of difference = 0.993

t critical = 2.034 for 90% df 34

Hence confid. interval at 90%

=Mean diff ±2.034 * std error of diff

= (0.98, 5.02)

5 0
2 years ago
How much interest is earned on a principle of $864.27 invested at an interest rate of 8% for 3 years? Round to the nearest cent
amid [387]

Answer:

the interest =20.74

whereas the total sum=8850(the sum is the nearest cent)

<h2><em><u>HOPE</u></em><em><u> </u></em><em><u>IT</u></em><em><u> </u></em><em><u>HELPS</u></em><em><u> </u></em><em><u>YO</u></em><em><u>U</u></em></h2>

7 0
2 years ago
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