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Alisiya [41]
2 years ago
6

Scores on IQ tests are normally distributed, with a mean of 100 and a standard deviation of 15. What is the score such that 10 p

ercent of people taking the test achieve a higher score
Mathematics
1 answer:
Studentka2010 [4]2 years ago
3 0

Answer:

103.75 score

Step-by-step explanation:

10 % scored higher than the mean?

 50% is the mean %   so we need to look for the z score corresponding to 60 %    from z-score table   this is z-score of   .25

.25 standard deviations (which is 15)   above 100 =

    .25  * 15       +   100 = 103.75   score

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4) The square root of 25 is rational

5) pi is irrational

Step-by-step explanation:

To know if the answer is rational or irrational, check to see if they can be turned into a fraction.

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2 years ago
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Rewrite the following expression in three different ways 5(6-2z)
miv72 [106K]

Answer:

5(-2z+6)

30-10z

-10z+30

Step-by-step explanation:

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2 years ago
<img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B16%20%7Bx%7D%5E%7B4%7D%20%7D%20%20-%20%20%5Csqrt%5B3%5D%7B128x%7D%20" id="
NemiM [27]

Kudos to the poster on the typeset math.


With cube roots we don't have to worry that things are positive.


\sqrt[3]{16 x^4} - \sqrt[3]{128 x} =  \sqrt[3]{2^4 x^4} - \sqrt[3]{2^7 x} = \sqrt[3]{2^3 x^3 2x} - \sqrt[3]{4^3 2 x} = 2x\sqrt[3]{2x} - 4\sqrt[3]{2 x}


= (2x-4)\sqrt[3]{2 x}

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2 years ago
Help mee!! I will give brainliesttt
Fofino [41]

Answer:

c = 12

Step-by-step explanation:

the ratio of sides in a 30-60-90° triangle, respectively, is 1: \sqrt{3} : 2

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7 0
3 years ago
An employee at a gift shop earns $72.00 for working 9 hours. At this hourly rate, what should the employee earn for a 40-hour wo
ZanzabumX [31]

Answer:

The employee would earn $320 for a 40-hour work week.

Step-by-step explanation:

Given

  • Total Earning amount = $72.00
  • Total Time taken = 9 hours

To determine

We have to find the employee's earning earn for a 40-hour work week.

<u>First Step</u>

Determining the hourly rate

In order to determine the hourly rate, the first step we need to do is to divide the earning amount by the total number of hours.

Hourly rate = Total Earning amount / Total Time taken

                   = $72.00 / 9 hours

                   = $8.00 per hour

<u>Second Step</u>

Determining the employee's earning earn for a 40-hour work week.

As we have already determined that employee is earning $8.00 per hour.

i.e.

  • Hourly rate = $8.00 per hour

In order to determine the employee's earning for a 40-hour work week, all we need is to multiply the hourly rate i.e. 8 with 40.

Thus,

Earning for 40-hour work week = Hourly rate × 40

                                                     = 8.00 × 40

                                                     = $320

Therefore, the employee would earn $320 for a 40-hour work week.

4 0
3 years ago
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