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3 years ago

A sofa regularly sells for 600. The sale price is 480.00. Find the percent decrease of the sale price from the regular price.

Mathematics

1 answer:

Lady_Fox [76]3 years ago

4 0

Answer:

-20%

Step-by-step explanation:

Regular price = $600

Current sale price = $480

To find the percentage decrease in this case, use percentage change formula;

Percentage change = $\frac{Current price - Regular price}{Regular price}$ *100

Next, plug in the numbers into the formula ;

Percentage change = $\frac{(480 -600)}{600}*100 \\ \\ =\frac{-120}{600} *100\\ \\ =-0.2*100\\ \\ =-20%$

Therefore, the percentage decrease is -20%

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The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.917 g and a standard deviation

Nutka1998 [239]

Answer:

$z = \frac{0.872-0.917}{\frac{0.303}{\sqrt{37}}}= -0.903$

And we can find this probability to find the answer:

$P(z$

And using the normal standar table or excel we got:

$P(z$

Step-by-step explanation:

Let X the random variable that represent the amounts of nocatine of a population, and for this case we know the distribution for X is given by:

$X \sim N(0.917,0.303)$

Where $\mu=0.917$ and $\sigma=0.303$

We have the following info from a sample of n =37:

$\bar X= 0.872$ the sample mean

And we want to find the following probability:

$P(\bar X \leq 0.872)$

And we can use the z score formula given by;

$z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score for the value of 0.872 we got:

$z = \frac{0.872-0.917}{\frac{0.303}{\sqrt{37}}}= -0.903$

And we can find this probability to find the answer:

$P(z$

And using the normal standar table or excel we got:

$P(z$

6 0

3 years ago

What is the least common multiple of 15 and 6?<br><br> Take notes and show your work.

Mariulka [41]

Hello!

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zubka84 [21]

Answer:

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5 0

3 years ago

Find the value of x. if necessary, round to the nearest tenth a=47sq in

kipiarov [429]

the picture in the attached figure

we know that

area of the triangle is equal to

$A=(b*h)/2$

in this problem

A=47 in²

b=x

h=x

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3 0

3 years ago

Read 2 more answers

Need help with the last three asap

Sunny_sXe [5.5K]

13) Angle 1= 54 Angle 2=36
14) Angle 1=122 Angle 2=58
15) Angle 1=51 Angle 2=39
Attached is the work
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7 0

2 years ago