I need help with this please

Mathematics

2 answers:

Liono4ka [1.6K]3 years ago

5 0

I believe it's A,E, and D.

Oksanka [162]3 years ago

5 0

I agree as well I think it’s A,E, or B

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Assume that X is Normal with mean $ 240 and standard deviation $60 . the probability that , in a randomly selected week , Dan wi

enyata [817]

Answer:

The probability of Dan making less than $255 is 0.5987 or 59.87%

Step-by-step explanation:

Given that:

Mean = μ = $240

SD = σ = $60

We have to find the probability that Dan will make less than $255

First of all, we have to find the z-score of 255

z-score is denoted by z and is given by the formula

$z = \frac{x-mean}{SD}$

Here,

x = 255

Putting the values

$z = \frac{255-240}{60}\\z = \frac{15}{60}\\z = 0.25$

Now we have to look at the z-score table to find the probability of 0.25

P(x<255) = 0.5987

Converting into percentage

59.87%

Hence,

The probability of Dan making less than $255 is 0.5987 or 59.87%

3 0

3 years ago

Divide each of the following by 10, 100, and 1000: 67.8, 456.8, 531.20.

Inessa05 [86]

67.8: 6.78, 0.678, 0.0677
456.8: 45.68, 4.568, 0.4568
531.20: 53.12, 5.312, 0.5312
The pattern here is that the number of 0s there are in the digit of whatever you are dividing by, that is how many places you move the decimal place to the right. For example, by dividing 67.8 by 100, the decimal place has been moved 2 places to the right, resulting in the number 0.678

6 0

4 years ago

Please help me with question2 someone, thanks

Minchanka [31]

Answer:

Step-by-step explanation:

$\frac{3x-y}{4x+5y}=\frac{3}{5}\\\\$