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nignag [31]
3 years ago
14

The costs of 2 sound systems were decreased by $10. The original costs of the systems were $90 and $60. Without calculating, whi

ch had a greater percent of decrease? Explain.
Mathematics
1 answer:
bezimeni [28]3 years ago
4 0
The 60$ system had a greater percentage decrease because it was a lower number to begin with. Taking the same portion out of two different numbers will always be a greater decrease for the lower number.
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I’m another normally distributed test score is 80 and the standard deviations is 10. How common are values in the less than 60?
lord [1]

Answer:

<em>The probability of obtaining a score less than 60 is 2.28% </em>

<em>It happens 2 out of 100 times.</em>

Step-by-step explanation:

If the mean μ = 80 and the standard deviation σ = 10, then we need to find the probability that an X value is less than 60.

Then we find

P(X

To find this probability we use the Z statistic.

Z = \frac{X- \mu}{\sigma}

P(\frac{X- \mu}{\sigma}

P(Z

This is the same as

P(Z> 2)

We look for this value in the table for the normal distribution of right queue and we have:

P(X  2) = 0.02275

<em>The probability of obtaining a score less than 60 is 2.28% </em>

<em>It happens 2 out of 100 times.</em>

6 0
3 years ago
A company sells its printers to customers in order to make a profit of 25% calculate the price the company paid for a printer wh
ioda

The company paid $2000 for the printer

Step-by-step explanation:

Let x be the price of the printer for which the company bought it.

If x is the price of printer, then 25% of x will be the profit made by the company.

That is:

0.25x

According to the statement,

The cost and profit earned by company are equal to 2500

So,

x+0.25x = 2500\\1.25x = 2500

Dividing both sides by 1.25

\frac{1.25x}{1.25} = \frac{2500}{1.25}\\x = 2000

Hence,

The company paid $2000 for the printer

Keywords: Percentage, Profit

Learn more about percentage at:

  • brainly.com/question/10772025
  • brainly.com/question/10879401

#LearnwithBrainly

7 0
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What is the hight of a cone with a radius of 4 inches and of volume of 8 cubic inches? Round your Answer to the tenths place.
Scorpion4ik [409]

Answer:

0.48

Step-by-step explanation:

You use the formula V=πr2 h/3

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